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  • Class Myxini
    • Order Myxiniformes
      • Family Myxinidae Rafinesque 1815 (hagfishes)
        • Subfamily Rubicundinae Fernholm, Norén, Kullander, Quattrini et al. 2013 (reddish hagfishes)
        • Subfamily Eptatretinae Bonaparte 1850 (multi-gill hagfishes)
        • Subfamily Myxininae Rafinesque 1815 (hagfishes)
  • Class Petromyzonti
    • Order Petromyzontiformes
      • Family Petromyzontidae Bonaparte 1831 (lampreys)
      • Family Geotriidae Gill 1893 (pouched lampreys)
      • Family Mordaciidae Gill 1893 (southern topeyed lampreys)
  • Class Elasmobranchii
    • Order Hexanchiformes
      • Family Hexanchidae Gray 1851 (cow sharks)
      • Family Chlamydoselachidae Garman 1884 (frill sharks)
    • Order Heterodontiformes
      • Family Heterodontidae Gray 1851 (bullhead sharks or horn sharks)
    • Order Orectolobiformes
      • Family Rhincodontidae Müller & Henle 1841 (whale sharks)
      • Family Parascylliidae Gill 1862 (collared carpet sharks)
      • Family Brachaeluridae Applegate 1974 (blind sharks)
      • Family Orectolobidae Gill 1896 (wobbegongs)
      • Family Hemiscylliidae Gill 1862 (bamboo sharks)
      • Family Stegostomatidae Gill 1862 (zebra sharks)
      • Family Ginglymostomatidae Gill 1862 (nurse sharks)
    • Order Lamniformes
      • Family Mitsukurinidae Jordan 1898 (goblin sharks)
      • Family Carchariidae Müller & Henle 1838 (sand tigers)
      • Family Odontaspididae Müller & Henle 1839 (sand tiger sharks)
      • Family Pseudocarchariidae Taylor, Compagno & Struhsaker 1983 (crocodile sharks)
      • Family Megachasmidae Taylor, Compagno & Struhsaker 1983 (megamouth sharks)
      • Family Alopiidae Bonaparte 1835 (thresher sharks)
      • Family Cetorhinidae Gill 1861 (basking sharks)
      • Family Lamnidae Bonaparte 1835 (mackerel sharks)
    • Order Carcharhiniformes
      • Suborder Scyliorhinoidei
        • Family Scyliorhinidae Gill 1862 (catsharks)
      • Suborder Carcharhinoidei
        • Family Atelomycteridae White 1936 (coloured catsharks)
        • Family Pentanchidae Smith 1912 (deepwater catsharks)
        • Family Dichichthyidae White, Stewart, O'Neill & Naylor 2024 (bristle sharks)
        • Family Pseudotriakidae Gill 1893 (false catsharks)
        • Family Proscylliidae Fowler 1941 (finback catsharks)
        • Family Leptochariidae Gray 1851 (barbeled houndsharks)
        • Family Triakidae Gray 1851 (houndsharks)
          • Subfamily Triakinae Gray 1851 (smouth-hounds)
          • Subfamily Galeorhininae Gill 1862 (school sharks)
        • Family Hemigaleidae Hasse 1878 (weasel sharks)
        • Family Carcharhinidae Jordan & Evermann 1896 (requiem sharks)
        • Family Galeocerdonidae Poey 1875 (tiger sharks)
        • Family Sphyrnidae Bonaparte 1840 (hammerhead sharks)
    • Order Squaliformes
      • Family Dalatiidae Gray 1851 (kitefin sharks)
      • Family Etmopteridae Fowler 1934 (lantern sharks)
      • Family Somniosidae Jordan 1888 (sleeper sharks)
      • Family Oxynotidae Gill 1863 (rough sharks)
      • Family Centrophoridae Bleeker 1859 (gulper sharks)
      • Family Squalidae Blainville 1816 (dogfish sharks)
    • Order Echinorhiniformes
      • Family Echinorhinidae Gill 1862 (bramble sharks)
    • Order Pristiophoriformes
      • Family Pristiophoridae Bleeker 1859 (saw sharks)
    • Order Squatiniformes
      • Family Squatinidae Blainville 1816 (angel sharks)
    • Order Torpediniformes
      • Family Platyrhinidae Jordan 1923 (thornbacks or fanrays)
      • Family Narkidae Fowler 1934 (sleeper rays)
      • Family Narcinidae Gill 1862 (electric rays)
      • Family Hypnidae Gill 1862 (coffin rays)
      • Family Torpedinidae Henle 1834 (torpedo electric rays or torpedo rays)
    • Order Rhinopristiformes
      • Family Trygonorrhinidae Last, Séret & Naylor 2016 (fiddler rays or banjo rays)
      • Family Rhinobatidae Bonaparte 1835 (guitarfishes)
      • Family Rhinidae Müller & Henle 1841 (bowmouth guitarfishes or wedgefishes)
      • Family Glaucostegidae Last, Séret & Naylor 2016 (giant guitarfishes)
      • Family Pristidae Bonaparte 1835 (sawfishes)
    • Order Rajiformes
      • Family Rajidae Blainville 1816 (hardnose skates)
      • Family Arhynchobatidae Fowler 1934 (softnose skates or longtail skates)
      • Family Gurgesiellidae de Buen 1959 (pygmy skates)
      • Family Anacanthobatidae von Bonde & Swart 1923 (legskates or smooth skates)
    • Order Myliobatiformes
      • Family Zanobatidae Fowler 1934 (panrays)
      • Family Hexatrygonidae Heemstra & Smith 1980 (sixgill stingrays)
      • Family Dasyatidae Jordan & Gilbert 1879 (whiptail stingrays)
        • Subfamily Dasyatinae Jordan & Gilbert 1879 (stingrays)
        • Subfamily Neotrygoninae Last, Naylor & Manjaji-Matsumoto 2016 (shortsnout stingrays)
        • Subfamily Urogymninae Gray 1851 (whiprays)
        • Subfamily Hypolophinae Stromer 1910 (cowtail stingrays)
      • Family Potamotrygonidae Garman 1877 (neotropical stingrays)
        • Subfamily Styracurinae Carvalho, Loboda & da Silva 2016 (whiptail stingrays)
        • Subfamily Potamotrygoninae Garman 1877 (river stingrays)
      • Family Urotrygonidae McEachran, Dunn & Miyake 1996 (American round stingrays)
      • Family Gymnuridae Fowler 1934 (butterfly rays)
      • Family Plesiobatidae Nishida 1990 (deepwater stingrays or giant stingarees)
      • Family Urolophidae Müller & Henle 1841 (round stingrays or stingarees)
      • Family Aetobatidae Agassiz 1858 (pelagic eagle rays)
      • Family Myliobatidae Bonaparte 1835 (eagle rays)
      • Family Rhinopteridae Jordan & Evermann 1896 (cownose rays)
      • Family Mobulidae Gill 1893 (mantas or devil rays)
  • Class Holocephali
    • Order Chimaeriformes
      • Family Callorhinchidae Garman 1901 (plownose chimaeras)
      • Family Chimaeridae Rafinesque 1815 (shortnose chimaeras or ratfishes)
      • Family Rhinochimaeridae Garman 1901 (longnose chimaeras)
  • Class Cladistii
    • Order Polypteriformes
      • Family Polypteridae Bonaparte 1835 (bichirs)
  • Class Actinopteri
    • Order Acipenseriformes
      • Family Acipenseridae Bonaparte 1831 (sturgeons)
      • Family Polyodontidae Bonaparte 1835 (paddlefishes)
    • Order Amiiformes
      • Family Amiidae Bonaparte 1831 (bowfins)
    • Order Lepisosteiformes
      • Family Lepisosteidae Agassiz 1832 (gars)
    • Order Hiodontiformes
      • Family Hiodontidae Valenciennes 1847 (mooneyes)
    • Order Osteoglossiformes
      • Family Pantodontidae Peters 1876 (freshwater butterfly fishes)
      • Family Osteoglossidae Bonaparte 1845 (bonytongues)
      • Family Arapaimidae Bonaparte 1846 (arapaimas)
      • Family Notopteridae Bleeker 1851 (featherfin knifefishes or featherbacks)
        • Subfamily Notopterinae Bleeker 1851 (Asiatic featherbacks)
        • Subfamily Xenomystinae Greenwood 1963 (African knifefishes)
      • Family Mormyridae Bonaparte 1831 (elephantfishes)
      • Family Gymnarchidae Bleeker 1859 (abas)
    • Order Elopiformes
      • Family Elopidae Valenciennes 1847 (tenpounders and ladyfishes)
      • Family Megalopidae Jordan & Gilbert 1883 (tarpons)
    • Order Albuliformes
      • Family Albulidae Bleeker 1849 (bonefishes)
        • Subfamily Albulinae Bleeker 1849 (bonefishes)
        • Subfamily Pterothrissinae Gill 1893 (longfin bonefishes or deepwater bonefishes)
    • Order Notacanthiformes
      • Family Halosauridae Günther 1868 (halosaurs)
      • Family Notacanthidae Rafinesque 1810 (deepsea spiny eels)
    • Order Anguilliformes
      • Family Chlopsidae Rafinesque 1815 (false morays)
    • Suborder Synaphobranchoidei
      • Family Protanguillidae Johnson, Ida & Miya 2011 (primitive cave eels)
      • Family Synaphobranchidae Johnson 1862 (cutthroat eels)
        • Subfamily Simenchelyinae Gill 1879 (pugnose parasitic eels)
        • Subfamily Ilyophinae Jordan & Davis 1891 (arrowtooth eels or mustard eels)
        • Subfamily Synaphobranchinae Johnson 1862 (cutthroat eels)
    • Suborder Anguilloidei
      • Family Moringuidae Gill 1885 (spaghetti eels)
      • Family Anguillidae Rafinesque 1810 (freshwater eels)
      • Family Nemichthyidae Kaup 1859 (snipe eels or threadtail snipe eels)
      • Family Serrivomeridae Trewavas 1932 (sawtooth eels)
      • Family Cyematidae Regan 1912 (bobtail eels)
      • Family Monognathidae Trewavas 1937 (onejaw gulpers)
      • Family Neocyematidae Poulsen, Miller, Sado, Hanel, Tsukamoto & Miya 2018 (orange bobtail eels)
      • Family Eurypharyngidae Gill 1883 (gulper eels or pelican eels)
      • Family Saccopharyngidae Bleeker 1859 (swallower eels or whiptail gulpers)
    • Suborder Muraenoidei
      • Family Heterenchelyidae Regan 1912 (mud eels)
      • Family Myrocongridae Gill 1890 (myroconger eels)
      • Family Muraenidae Rafinesque 1815 (moray eels)
        • Subfamily Uropterygiinae Fowler 1925 (tailfin moray eels)
        • Subfamily Muraeninae Rafinesque 1815 (morays)
    • Suborder Congroidei
      • Family Colocongridae Smith 1976 (shorttail eels)
      • Family Derichthyidae Gill 1884 (longneck eels or narrowneck eels)
      • Family Ophichthidae Günther 1870 (snake eels and worm eels)
        • Subfamily Myrophinae Kaup 1856 (worm eels)
        • Subfamily Ophichthinae Günther 1870 (snake eels)
      • Family Muraenesocidae Kaup 1859 (pike conger eels)
      • Family Nettastomatidae Kaup 1859 (duckbill eels)
      • Family Congridae Kaup 1856 (conger eels)
        • Subfamily Congrinae Kaup 1856 (congers)
        • Subfamily Bathymyrinae Böhlke 1949
        • Subfamily Heterocongrinae Günther 1870 (garden eels)
  • Order Clupeiformes
    • Suborder Denticipitoidei
      • Family Denticipitidae Clausen 1959 (denticle herrings)
    • Suborder Clupeoidei
      • Family Spratelloididae Jordan 1925 (dwarf herrings or small round herrings)
      • Family Engraulidae Gill 1861 (anchovies)
        • Subfamily Coiliinae Bleeker 1872 (Old World anchovies)
        • Subfamily Engraulinae Gill 1861 (anchovies)
      • Family Clupeidae Cuvier 1816 (herrings and sprats)
      • Family Chirocentridae Bleeker 1849 (wolf herrings)
      • Family Dussumieriidae Gill 1861 (round herrings or rainbow sardines)
      • Family Pristigasteridae Bleeker 1872 (longfin herrings)
      • Family Ehiravidae Deraniyagala 1929 (river sprats)
      • Family Alosidae Svetovidov 1952 (shads and sardines)
      • Family Dorosomatidae Gill 1861 (thread herrings or gizzard shads and sardinellas)
  • Order Alepocephaliformes
    • Family Alepocephalidae Bonaparte 1846 (slickheads)
    • Family Platytroctidae Koefoed 1927 (tubeshoulders)
  • Order Gonorynchiformes
    • Family Chanidae Günther 1868 (milkfishes)
    • Family Gonorynchidae Fowler 1941 (1848) (beaked sandfishes)
    • Family Kneriidae Günther 1868 (shellears)
    • Family Phractolaemidae Boulenger 1901 (snake mudheads)
  • Order Cypriniformes
    • Suborder Gyrinocheiloidei
      • Family Gyrinocheilidae Gill 1907 (algae eaters)
    • Suborder Catostomoidei
      • Family Catostomidae Agassiz 1850 (suckers)
        • Subfamily Myxocyprininae Fowler 1958 (Chinese suckers)
        • Subfamily Cycleptinae Gill 1861 (blue suckers)
        • Subfamily Ictiobinae Bleeker 1863 (carpsuckers and buffalos)
        • Subfamily Catostominae Agassiz 1850 (suckers)
    • Suborder Cobitoidei
      • Family Botiidae Berg 1940 (pointface loaches)
        • Subfamily Leptobotiinae Nalbant 2002 (Chinese pointface loaches)
        • Subfamily Botiinae Berg 1940 (beautiful loaches)
      • Family Vaillantellidae Nalbant & Bănărescu 1977 (longfin loaches)
      • Family Cobitidae Swainson 1838 (spined loaches)
      • Family Barbuccidae Kottelat 2012 (scooter loaches)
      • Family Gastromyzontidae Fowler 1905 (hillstream loaches)
      • Family Serpenticobitidae Kottelat 2012 (snake loaches)
      • Family Balitoridae Swainson 1839 (river loaches)
      • Family Ellopostomatidae Bohlen & Šlechtová 2009 (square-head loaches)
      • Family Nemacheilidae Regan 1911 (brook loaches)
    • Suborder Cyprinoidei
      • Family Paedocyprididae Mayden & Chen 2010 (tiny carps)
      • Family Psilorhynchidae Hora 1926 (mountain carps)
      • Family Cyprinidae Rafinesque 1815 (carps)
        • Subfamily Labeoninae Bleeker 1859 (labeonines)
        • Subfamily Probarbinae Yang et al. 2015 (primitive cyprinids)
        • Subfamily Torinae Karaman 1971 (large barbs)
        • Subfamily Smiliogastrinae Bleeker 1863 (small barbs)
        • Subfamily Cyprininae Rafinesque 1815 (carps)
        • Subfamily Acrossocheilinae Yang et al. 2015 (East Asian barbs)
        • Subfamily Barbinae Bleeker 1859 (barbels)
        • Subfamily Spinibarbinae Yang et al. 2015 (spine barbs)
        • Subfamily Schizothoracinae McClelland 1842 (snow barbels)
        • Subfamily Schizopygopsinae Mirza 1991 (mountain barbels)
      • Family Sundadanionidae Mayden & Chen 2010 (tiny danios)
      • Family Danionidae Bleeker 1863 (danionids)
        • Subfamily Chedrinae Bleeker 1863 (troutbarbs)
        • Subfamily Rasborinae Günther 1868 (rasborines)
        • Subfamily Danioninae Bleeker 1863 (danionines)
        • Subfamily Esominae Tan & Armbruster 2018 (flying barbs)
      • Family Leptobarbidae Bleeker 1864 (cigar barbs)
      • Family Xenocyprididae Günther 1868 (East Asian minnows or sharpbellies)
      • Family Tincidae Jordan 1878 (tenches)
      • Family Acheilognathidae Bleeker 1863 (bitterlings)
      • Family Gobionidae Bleeker 1863 (freshwater gudgeons)
      • Family Tanichthyidae Mayden & Chen 2010 (mountain minnows)
      • Family Leuciscidae Bonaparte 1835 (minnows)
        • Subfamily Pseudaspininae Bogutskaya 1990 (Far East Asian leuciscines)
        • Subfamily Laviniinae Bleeker 1863 (western chubs)
        • Subfamily Plagopterinae Cope 1874 (creek chubs)
        • Subfamily Leuciscinae Bonaparte 1835 (leuciscines)
        • Subfamily Phoxininae Bleeker 1863 (phoxinines)
        • Subfamily Pogonichthyinae Girard 1858 (minnows & shiners)
  • Order Gymnotiformes
    • Family Apteronotidae Jordan 1923 (ghost knifefishes)
      • Subfamily Sternarchorhamphinae Albert 2001 (longsnout knifefishes)
      • Subfamily Apteronotinae Jordan 1923 (ghost knifefishes)
    • Family Sternopygidae Cope 1871 (glass knifefishes)
      • Subfamily Sternopyginae Cope 1871 (rattail knifefishes)
      • Subfamily Eigenmanniinae Mago-Leccia 1978 (glass knifefishes)
    • Family Gymnotidae Rafinesque 1815 (gymnotid eels)
      • Subfamily Electrophorinae Gill 1872 (electric eels)
      • Subfamily Gymnotinae Rafinesque 1815 (nakedback knifefishes)
    • Family Hypopomidae Eigenmann 1912 (bluntnose knifefishes)
    • Family Rhamphichthyidae Regan 1911 (painted knifefishes)
  • Order Characiformes
    • Suborder Citharinoidei
      • Family Citharinidae Günther 1864 (citharinids)
      • Family Distichodontidae Günther 1864 (distichodontids)
    • Suborder Characoidei
      • Family Crenuchidae Günther 1864 (crenuchids)
        • Subfamily Crenuchinae Günther 1864 (sailfin tetras)
        • Subfamily Characidiinae Fowler 1932 (South American darters)
      • Family Alestidae Cockerell 1910 (African tetras)
      • Family Hepsetidae Hubbs 1939 (African pikes)
      • Family Tarumaniidae de Pinna, Zuanon, Rapp Py-Daniel & Petry 2017 (muckfishes)
      • Family Erythrinidae Valenciennes 1847 (trahiras)
      • Family Parodontidae Eigenmann 1910 (darter tetras)
      • Family Cynodontidae Eigenmann 1903 (sabertoothed characids)
      • Family Serrasalmidae Bleeker 1859 (piranhas and allies)
        • Subfamily Colossomatinae Kolmann et al. 2021 (lowland pacus)
        • Subfamily Myleinae Eigenmann 1903 (upland pacus)
        • Subfamily Serrasalminae Bleeker 1859 (piranhas)
      • Family Hemiodontidae Bleeker 1859 (hemiodontids)
      • Family Anostomidae Günther 1864 (toothed headstanders)
      • Family Chilodontidae Eigenmann 1903 (headstanders)
      • Family Curimatidae Gill 1858 (toothless characiforms)
      • Family Prochilodontidae Eigenmann 1909 (bocachicos)
      • Family Lebiasinidae Gill 1889 (lebiasinids)
        • Subfamily Lebiasininae Gill 1889 (lebiasinas)
        • Subfamily Pyrrhulininae Bleeker 1859 (splashing tetras and pencilfishes)
      • Family Ctenoluciidae Schultz 1944 (pike characids)
      • Family Chalceidae Fowler 1958 (tucanfishes)
      • Family Triportheidae Fowler 1940 (hatchet characins)
        • Subfamily Triportheinae Fowler 1940 (keeled characines)
        • Subfamily Agoniatinae Bleeker 1859 (anchovy characines)
        • Subfamily Clupeacharacinae Fowler 1958 (herring characines)
      • Family Gasteropelecidae Bleeker 1859 (freshwater hatchetfishes)
      • Family Bryconidae Eigenmann 1912 (bryconids)
        • Subfamily Bryconinae Eigenmann 1912 (bryconines)
        • Subfamily Salmininae Cockerell 1915 (dorados)
      • Family Iguanodectidae Eigenmann 1909 (iguanodectids)
      • Family Acestrorhynchidae Eigenmann 1912 (freshwater barracudas and biting tetras)
        • Subfamily Acestrorhynchinae Eigenmann 1912 (freshwater barracudas)
        • Subfamily Roestinae Lucena & Menezes 1998 (biting tetras)
        • Subfamily Heterocharacinae Géry 1966 (small biting tetras)
      • Family Spintherobolidae Mirande 2018 (piquiras)
      • Family Stevardiidae Gill 1858 (stevardiids)
        • Subfamily Landoninae Weitzman & Menezes 1998 (caudal sac characins)
        • Subfamily Xenurobryconinae Myers & Böhlke 1956 (xenurobryconins)
        • Subfamily Glandulocaudinae Eigenmann 1914 (chirping tetras)
        • Subfamily Argopleurinae Melo & Oliveira 2024 (Andean tetras)
        • Subfamily Hemibryconinae Géry 1966 (hemibryconins)
        • Subfamily Stevardiinae Gill 1858 (stevardiines)
        • Subfamily Planaltininae Oliveira & Souza 2024 (Brazilian Shield tetras)
        • Subfamily Creagrutinae Miles 1943 (creagrutins)
        • Subfamily Diapominae Eigenmann 1909
      • Family Characidae Latreille 1825 (characids)
        • Subfamily Aphyocharacinae Eigenmann 1909 (glass characins)
        • Subfamily Cheirodontinae Eigenmann 1915 (cheirodontines)
        • Subfamily Exodontinae Fowler 1958 (lepidophagous characins)
        • Subfamily Tetragonopterinae Gill 1858
        • Subfamily Characinae Latreille 1825 (characines)
      • Family Acestrorhamphidae Eigenmann 1907 (American tetras)
        • Subfamily Oxybryconinae Melo, Mattox & Oliveira 2024
        • Subfamily Trochilocharacinae Zarske 2010 (hummingbird characins)
        • Subfamily Stygichthyinae Géry 1972
        • Subfamily Megalamphodinae Carvalho, Lima & Melo 2024 (red tetras)
        • Subfamily Stichonodontinae Eigenmann 1910
        • Subfamily Stethaprioninae Eigenmann 1907 (discus tetras)
        • Subfamily Pristellinae Géry & Boutière 1964
        • Subfamily Jupiabinae Benine & Ota 2024
        • Subfamily Tyttobryconinae Mattox & Melo 2024
        • Subfamily Hyphessobryconinae Lima, Carvalho & Faria 2024 (multicusp characins)
        • Subfamily Thayeriinae Ota, Reia & Benine 2024
        • Subfamily Rhoadsiinae Fowler 1911 (Pacific characins)
        • Subfamily Grundulinae Fowler 1958
        • Subfamily Acestrorhamphinae Eigenmann 1907
      • Family Characids incertae sedis
  • Order Siluriformes
    • Suborder Diplomystoidei
      • Family Diplomystidae Eigenmann 1890 (diplomystid catfishes)
    • Suborder Cetopsoidei
      • Family Cetopsidae Bleeker 1858 (cetopsid catfishes)
        • Subfamily Cetopsinae Bleeker 1858 (whalelike catfishes)
        • Subfamily Helogeninae Regan 1911 (marbled catfishes)
    • Suborder Loricarioidei
      • Family Nematogenyidae Bleeker 1862 (mountain catfishes)
      • Family Trichomycteridae Bleeker 1858 (pencil catfishes)
        • Subfamily Copionodontinae de Pinna 1992 (Chapada pencil catfishes)
        • Subfamily Trichogeninae Isbrücker 1986 (longfin pencil catfishes)
        • Subfamily Trichomycterinae Bleeker 1858 (pencil catfishes)
        • Subfamily Microcambevinae Costa, Henschel & Katz 2020 (Atlantic Forest trichomycterids)
        • Subfamily Glanapteryginae Myers 1944 (miniature pencil catfishes)
        • Subfamily Sarcoglanidinae Myers & Weitzman 1966 (psammophilic catfishes)
        • Subfamily Tridentinae Eigenmann 1918 (tiny pencil catfishes)
        • Subfamily Stegophilinae Günther 1864 (parasitic catfishes)
        • Subfamily Vandelliinae Bleeker 1862 (hematophagous catfishes)
      • Family Callichthyidae Bonaparte 1835 (callichthyid armored catfishes)
        • Subfamily Callichthyinae Bonaparte 1835 (callichthyines)
        • Subfamily Corydoradinae Hoedeman 1952 (corys)
      • Family Loricariidae Rafinesque 1815 (suckermouth armored catfishes)
        • Subfamily Lithogeninae Gosline 1947 (climbing armored catfishes)
        • Subfamily Delturinae Reis, Pereira & Armbruster 2006 (primitive suckermouth catfishes)
        • Subfamily Rhinelepinae Armbruster 2004 (rhinelepine plecos)
        • Subfamily Loricariinae Rafinesque 1815 (mailed catfishes)
        • Subfamily Hypoptopomatinae Eigenmann & Eigenmann 1890 (cascudinhos)
        • Subfamily Hypostominae Kner 1853 (suckermouth catfishes)
      • Family Scoloplacidae Bailey & Baskin 1976 (spiny dwarf catfishes)
      • Family Astroblepidae Bleeker 1862 (climbing catfishes)
    • Suborder Siluroidei
      • Family Chacidae Bleeker 1858 (squarehead or angler catfishes)
      • Family Plotosidae Bleeker 1858 (eeltail catfishes)
      • Family Ritidae Bleeker 1862 (velvet catfishes)
      • Family Ailiidae Bleeker 1858 (Asian schilbeids)
      • Family Horabagridae Jayaram 2006 (imperial catfishes)
      • Family Bagridae Bleeker 1858 (bagrid catfishes)
      • Family Akysidae Gill 1861 (stream catfishes)
        • Subfamily Akysinae Gill 1861 (wasp catfishes)
        • Subfamily Parakysinae Roberts 1989 (warty catfishes)
      • Family Amblycipitidae Day 1873 (torrent catfishes)
      • Family Sisoridae Bleeker 1858 (sisorid catfishes)
        • Subfamily Sisorinae Bleeker 1858 (Asian stream catfishes)
        • Subfamily Glyptosterninae Gill 1861 (Asian sucker catfishes)
      • Family Pangasiidae Bleeker 1858 (pangasid catfishes)
      • Family Siluridae Rafinesque 1815 (sheatfishes)
      • Family Kryptoglanidae Britz, Kakkassery & Raghavan 2014 (Indian cave catfishes)
      • Family Aspredinidae Adams 1854 (banjo catfishes)
        • Subfamily Pseudobunocephalinae Carvalho, Arce H., Reis & Sabaj 2018 (terminal-mouth banjo catfishes)
        • Subfamily Hoplomyzontinae Fernández-Yépez 1950 (small banjo catfishes)
        • Subfamily Aspredininae Adams 1854 (banjo cats)
      • Family Auchenipteridae Bleeker 1862 (intromittant catfishes)
        • Subfamily Centromochlinae Bleeker 1862 (dimorphic intromittant catfishes)
        • Subfamily Auchenipterinae Bleeker 1862 (driftwood catfishes)
      • Family Doradidae Bleeker 1858 (thorny catfishes)
        • Subfamily Acanthodoradinae Sabaj & Mariangeles 2021
        • Subfamily Astrodoradinae Higuchi, Birindelli, Sousa & Britski 2007 (spotted thorny cats)
        • Subfamily Wertheimerinae Birindelli 2014 (Eastern Brazil thorny cats)
        • Subfamily Agamyxinae Sabaj & Mariangeles 2021
        • Subfamily Rhinodoradinae Sabaj & Mariangeles 2021
        • Subfamily Doradinae Bleeker 1858 (fimbriate-barbel thorny cats)
      • Family Heptapteridae Gill 1861 (seven-finned catfishes)
        • Subfamily Rhamdiinae Bleeker 1862 (whiskered catfishes)
        • Subfamily Heptapterinae Gill 1861 (slender whiskered catfishes)
      • Family Phreatobiidae Reichel 1927 (cistern catfishes)
      • Family Pimelodidae Bonaparte 1835 (long-whiskered catfishes)
      • Family Pseudopimelodidae Fernández-Yépez & Antón 1966 (bumblebee catfishes)
        • Subfamily Pseudopimelodinae Fernández-Yépez & Antón 1966
        • Subfamily Batrochoglaninae Shibatta & Silva 2021 (frog catfishes)
      • Family Clariidae Bonaparte 1845 (airbreathing or labyrinth catfishes)
      • Family Heteropneustidae Hora 1936 (airsac catfishes)
      • Family Ariidae Bleeker 1858 (sea catfishes)
        • Subfamily Galeichthyinae Acero & Betancur-R. 2007 (bearded sea catfishes)
        • Subfamily Ariinae Bleeker 1858
        • Subfamily Bagreinae Schultz 1944 (whiskered sea catfishes)
      • Family Anchariidae Glaw & Vences 1994 (Malagasy catfishes)
      • Family Austroglanididae Mo 1991 (rock catlets)
      • Family Cranoglanididae Myers 1931 (armorhead catfishes)
      • Family Ictaluridae Gill 1861 (North American freshwater catfishes)
      • Family Lacantuniidae Rodiles-Hernández, Hendrickson & Lundberg 2005 (Lacantún catfishes or Chiapas catfishes)
      • Family Amphiliidae Regan 1911 (loach catfishes)
        • Subfamily Amphiliinae Regan 1911 (amphiliine catfishes)
        • Subfamily Leptoglaninae Roberts 2003 (sand catlets)
        • Subfamily Doumeinae Regan 1911 (doumeine catfishes)
      • Family Malapteruridae Bleeker 1858 (electric catfishes)
      • Family Mochokidae Regan 1912 (squeakers and upside-down catfishes)
        • Subfamily Chiloglanidinae Vigliotta 2008 (African suckermouths)
        • Subfamily Mochokinae Regan 1912 (squeakers)
      • Family Auchenoglanididae Jayaram 1966 (flatnose catfishes)
      • Family Claroteidae Bleeker 1862 (grunter catfishes)
      • Family Schilbeidae Bleeker 1858 (schilbeid catfishes)
  • Order Lepidogalaxiiformes
    • Family Lepidogalaxiidae Rosen 1974 (salamanderfishes)
  • Order Argentiniformes
    • Family Argentinidae Bonaparte 1846 (argentines)
    • Family Opisthoproctidae Schmidt 1918 (spookfishes or barreleyes)
    • Family Microstomatidae Bleeker 1859 (pencilsmelts)
    • Family Bathylagidae Gill 1884 (deepsea smelts)
  • Order Salmoniformes
    • Suborder Salmonoidei
      • Family Salmonidae Jarocki / Schinz 1822 (salmonids)
        • Subfamily Coregoninae Bonaparte 1845 (whitefishes)
        • Subfamily Thymallinae Gill 1885 (graylings)
        • Subfamily Salmoninae Jarocki / Schinz 1822 (salmons, trouts, chars and allies)
    • Suborder Esocoidei
      • Family Esocidae Rafinesque 1815 (pikes)
        • Subfamily Dalliinae Jordan 1885 (blackfishes)
        • Subfamily Esocinae Rafinesque 1815 (pikes)
      • Family Umbridae Bonaparte 1845 (mudminnows)
  • Order Galaxiiformes
    • Family Galaxiidae Müller 1845 (galaxiids)
      • Subfamily Aplochitoninae Günther 1864 (peladillas)
      • Subfamily Galaxiinae Müller 1845 (white bait and mudfishes)
  • Order Osmeriformes
    • Suborder Retropinnoidei
      • Family Retropinnidae Gill 1862 (New Zealand smelts)
        • Subfamily Retropinninae Gill 1862 (southern smelts)
        • Subfamily Prototroctinae Hubbs 1952 (southern graylings)
    • Suborder Osmeroidei
      • Family Osmeridae Regan 1913 (smelts)
      • Family Plecoglossidae Bleeker 1859 (ayu fishes)
      • Family Salangidae Bleeker 1859 (icefishes or noodlefishes)
  • Order Stomiiformes
    • Family Gonostomatidae Cocco 1838 (bristlemouths)
    • Family Sternoptychidae Duméril 1805 (marine hatchetfishes)
      • Subfamily Maurolicinae Gill 1885
      • Subfamily Sternoptychinae Duméril 1805 (marine hatchetfishes)
    • Family Phosichthyidae Weitzman 1974 (lightfishes)
    • Family Stomiidae Bleeker 1859 (dragonfishes or barbeled dragonfishes)
      • Subfamily Chauliodontinae Bonaparte 1845 (viperfishes)
      • Subfamily Stomiinae Bleeker 1859 (scaly dragonfishes)
      • Subfamily Astronesthinae Günther 1864 (snaggletooths)
      • Subfamily Melanostomiinae Parr 1927 (scaleless black dragonfishes)
      • Subfamily Malacosteinae Gill 1890 (loosejaws)
      • Subfamily Idiacanthinae Gill 1893 (black dragonfishes)
  • Order Ateleopodiformes
    • Family Ateleopodidae Bonaparte 1850 (jellynose fishes)
  • Order Aulopiformes
    • Family Aulopidae Bonaparte 1831 (flagfins)
    • Family Chlorophthalmidae Garman 1899 (greeneyes)
    • Family Paraulopidae Sato & Nakabo 2002 (cucumber fishes)
    • Family Ipnopidae Gill 1884 (deepsea tripodfishes)
    • Family Bathysauroididae Sato & Nakabo 2002 (largescale deepsea lizardfishes)
    • Family Scopelarchidae Alcock 1896 (pearleyes)
    • Family Notosudidae Parr 1928 (paperbones or waryfishes)
    • Family Giganturidae Brauer 1906 (telescopefishes)
    • Family Synodontidae Gill 1861 (lizardfishes)
      • Subfamily Synodontinae Gill 1861 (lizardfishes)
      • Subfamily Harpadontinae Bleeker 1875 (Bombay ducks)
    • Family Bathysauridae Fowler 1944 (deepsea lizardfishes)
    • Family Paralepididae Bonaparte 1835 (barracudinas)
    • Family Anotopteridae Zugmayer 1911 (daggertooths)
    • Family Evermannellidae Fowler 1901 (sabertooth fishes)
    • Family Omosudidae Regan 1911 (hammerjaws)
    • Family Alepisauridae Swainson 1839 (lancetfishes)
    • Family Pseudotrichonotidae Yoshino & Araga 1975 (sand-diving lizardfishes)
  • Order Myctophiformes
    • Family Neoscopelidae Jordan 1901 (blackchins)
    • Family Myctophidae Gill 1893 (lanternfishes)
      • Subfamily Gymnoscopelinae Paxton 1972 (luminous lanternfishes)
      • Subfamily Notolychninae Paxton 1972 (topside lanternfishes)
      • Subfamily Lampanyctinae Paxton 1972 (toothy lampfishes)
      • Subfamily Diaphinae Paxton 1972 (headlightfishes)
      • Subfamily Myctophinae Gill 1893 (lanternfishes)
  • Order Lampriformes
    • Family Lampridae Gill 1862 (opahs)
    • Family Veliferidae Bleeker 1859 (velifers)
    • Family Lophotidae Bonaparte 1845 (crestfishes)
    • Family Radiicephalidae Osório 1917 (tapertails)
    • Family Trachipteridae Swainson 1839 (ribbonfishes or dealfishes)
    • Family Regalecidae Gill 1884 (oarfishes)
  • Order Polymixiiformes
    • Family Polymixiidae Bleeker 1859 (beardfishes)
  • Order Percopsiformes
    • Family Percopsidae Agassiz 1850 (trout-perches)
    • Family Aphredoderidae Bonaparte 1845 (pirate perches)
    • Family Amblyopsidae Bonaparte 1845 (cavefishes)
  • Order Zeiformes
    • Family Zeidae Rafinesque 1815 (dories)
    • Family Cyttidae Günther 1860 (lookdown dories)
    • Family Oreosomatidae Bleeker 1859 (oreos)
      • Subfamily Pseudocyttinae Tyler, O'Toole & Winterbottom 2003
      • Subfamily Oreosomatinae Bleeker 1859
    • Family Parazenidae McAllister 1968 (smooth dories)
      • Subfamily Parazeninae McAllister 1968
      • Subfamily Cyttopsinae no valid family-group name description
    • Family Zeniontidae Myers 1960 (dwarf dories or armoreye dories)
    • Family Grammicolepididae Poey 1873 (tinselfishes)
      • Subfamily Macrurocyttinae Myers 1960
      • Subfamily Grammicolepidinae Poey 1873
  • Order Gadiformes
    • Suborder Stylephoroidei
      • Family Stylephoridae Swainson 1839 (tube-eyes or threadtails)
    • Suborder Bregmacerotoidei
      • Family Bregmacerotidae Gill 1872 (codlets)
    • Suborder Gadoidei
      • Family Phycidae Swainson 1838 (phycid hakes)
      • Family Gaidropsaridae Jordan & Evermann 1898 (rocklings)
      • Family Lotidae Bonaparte 1835 (hakes and burbots)
      • Family Gadidae Rafinesque 1810 (cods and haddocks)
    • Suborder Ranicipitoidei
      • Family Ranicipitidae Bonaparte 1835 (tadpole fishes)
    • Suborder Merluccioidei
      • Family Merlucciidae Rafinesque 1815 (merlucciid hakes)
    • Suborder Macrouroidei
      • Family Euclichthyidae Cohen 1984 (Eucla cods)
      • Family Muraenolepididae Regan 1903 (eel cods)
      • Family Melanonidae Goode & Bean 1896 (arrowtails or pelagic cods)
      • Family Trachyrincidae Goode & Bean 1896 (armoured grenadiers)
      • Family Moridae Moreau 1881 (codlings or deepsea cods)
      • Family Macruronidae Regan 1903 (blue grenadiers)
      • Family Lyconidae Günther 1887 (Atlantic hakes)
      • Family Bathygadidae Jordan & Evermann 1898 (rattails)
      • Family Steindachneriidae Parr 1942 (luminous hakes)
      • Family Macrouridae Bonaparte 1831 (grenadiers or rattails)
  • Order Trachichthyiformes
    • Family Diretmidae Gill 1893 (spinyfins)
    • Family Monocentridae Gill 1859 (pinecone fishes)
    • Family Anomalopidae Gill 1889 (flashlightfishes or lanterneye fishes)
    • Family Trachichthyidae Bleeker 1856 (roughies or slimeheads)
    • Family Anoplogastridae Gill 1893 (fangtooths)
  • Order Beryciformes
    • Suborder Holocentroidei
      • Family Holocentridae Bonaparte 1833 (squirrelfishes and soldierfishes)
        • Subfamily Holocentrinae Bonaparte 1833 (squirrelfishes)
        • Subfamily Myripristinae Nelson 1955 (soldierfishes)
    • Suborder Berycoidei
      • Family Berycidae Lowe 1839 (berycids or alfonsinos)
      • Family Melamphaidae Gill 1893 (bigscales)
    • Suborder Stephanoberycoidei
      • Family Stephanoberycidae Gill 1884 (pricklefishes)
      • Family Hispidoberycidae Kotlyar 1981 (spiny-scale pricklefishes)
      • Family Gibberichthyidae Parr 1933 (gibberfishes)
      • Family Rondeletiidae Goode & Bean 1895 (redmouth whalefishes)
      • Family Barbourisiidae Parr 1945 (redvelvet whalefishes)
      • Family Cetomimidae Goode & Bean 1895 (whalefishes or flabby whalefishes)
  • Order Ophidiiformes
    • Family Acanthonidae Wong & Chen 2024 (deepsea cusk-eels)
    • Family Brotulidae Swainson 1838 (bearded cusk-eels)
    • Family Ophidiidae Rafinesque 1810 (cusk-eels)
      • Subfamily Brotulotaeniinae Cohen & Nielsen 1978 (prickle cusk-eels)
      • Subfamily Ophidiinae Rafinesque 1810 (true cusk-eels)
      • Subfamily Neobythitinae Radcliffe 1913
    • Family Carapidae Poey 1867 (pearlfishes)
      • Subfamily Carapinae Poey 1867 (fierasfers)
      • Subfamily Pyramodontinae Smith 1955 (pyramodontines)
      • Subfamily Tetragondacninae Anderson & Satria 2007 (square-mouthed pearlfishes)
      • Subfamily Hypopleuroninae Prokofiev 2004 (whiptail pearlfishes)
    • Family Bythitidae Gill 1861 (viviparous brotulas)
    • Family Dinematichthyidae Whitley 1928 (dwarf brotulas)
  • Order Batrachoidiformes
    • Family Batrachoididae Jordan 1896 (toadfishes)
      • Subfamily Porichthyinae Miranda Ribeiro 1915
      • Subfamily Thalassophryninae Miranda Ribeiro 1915 (venomous toadfishes)
      • Subfamily Batrachoidinae Jordan 1896
      • Subfamily Halophryninae Greenfield, Winterbottom & Collette 2008 (Old World threespine toadfishes)
  • Order Gobiiformes
    • Suborder Apogonoidei
      • Family Kurtidae Bleeker 1859 (nurseryfishes)
      • Family Apogonidae Günther 1859 (cardinalfishes)
        • Subfamily Apogoninae Günther 1859
        • Subfamily Pseudamiinae Smith 1954
        • Subfamily Amioidinae Fraser & Mabuchi 2014
        • Subfamily Paxtoninae Fraser & Mabuchi 2014
    • Suborder Trichonotoidei
      • Family Trichonotidae Günther 1861 (sand divers)
    • Suborder Gobioidei
      • Family Rhyacichthyidae Jordan 1905 (loach gobies)
      • Family Odontobutidae Hoese & Gill 1993 (Asian freshwater sleepers)
      • Family Eleotridae Bonaparte 1835 (sleepers)
        • Subfamily Butinae Bleeker 1874 (gudgeons)
        • Subfamily Eleotrinae Bonaparte 1835 (spinycheek sleepers or bullies)
        • Subfamily Milyeringinae Whitley 1945 (cave gudgeons)
      • Family Xenisthmidae Miller 1973 (collared wrigglers)
      • Family Oxudercidae Günther 1861 (mudskippers and allies)
        • Subfamily Oxudercinae Günther 1861 (mudskippers)
        • Subfamily Amblyopinae Günther 1861 (mudburrowing gobies)
        • Subfamily Gobionellinae Bleeker 1874 (estuarine gobies)
        • Subfamily Sicydiinae Gill 1860 (rock-climbing gobies)
      • Family Gobiidae Cuvier 1816 (gobies)
        • Subfamily Kraemeriinae Whitley 1935 (1911) (sand darts)
        • Subfamily Ptereleotrinae Bleeker 1875 (dart-gobies)
        • Subfamily Gobiinae Cuvier 1816 (sea gobies)
        • Subfamily Microdesminae Regan 1912 (wormfishes)
      • Family Thalasseleotrididae Gill & Mooi 2012 (ocean sleepers)
  • Order Syngnathiformes
    • Suborder Dactylopteroidei
      • Family Pegasidae Bonaparte 1831 (seamoths)
      • Family Dactylopteridae Gill 1861 (helmet gurnards or flying gurnards)
    • Suborder Mulloidei
      • Family Mullidae Rafinesque 1815 (goatfishes)
    • Suborder Callionymoidei
      • Family Callionymidae Bonaparte 1831 (dragonets)
      • Family Draconettidae Jordan & Fowler 1903 (slope dragonets)
    • Suborder Syngnathoidei
      • Family Aulostomidae Rafinesque 1815 (trumpetfishes)
      • Family Fistulariidae Stark 1828 (cornetfishes)
      • Family Centriscidae Bonaparte 1831 (snipefishes or shrimpfishes)
        • Subfamily Macroramphosinae Bleeker 1879 (snipefishes)
        • Subfamily Centriscinae Bonaparte 1831 (shrimpfishes)
      • Family Solenostomidae Nardo 1843 (ghost pipefishes)
      • Family Syngnathidae Bonaparte 1831 (pipefishes and seahorses)
        • Subfamily Nerophinae Kaup 1853 (trunk-brooding pipefishes)
        • Subfamily Syngnathinae Bonaparte 1831 (tail-brooding pipefishes)
  • Order Scombriformes
    • Suborder Stromateoidei
      • Family Amarsipidae Haedrich 1969 (bagless glassfishes or amarsipas)
      • Family Centrolophidae Bonaparte 1846 (medusafishes)
      • Family Nomeidae Günther 1860 (driftfishes)
      • Family Tetragonuridae Risso 1827 (squaretails)
      • Family Ariommatidae Haedrich 1967 (ariommas or ariommatids)
      • Family Stromateidae Rafinesque 1810 (butterfishes)
    • Suborder Scombroidei
      • Family Pomatomidae Gill 1863 (bluefishes)
      • Family Icosteidae Jordan & Gilbert 1880 (ragfishes)
      • Family Arripidae Gill 1893 (Australian salmons)
      • Family Chiasmodontidae Jordan & Gilbert 1883 (swallowers)
      • Family Scombridae Rafinesque 1815 (mackerels, tunas and bonitos)
        • Subfamily Gasterochismatinae Poey 1869 (kingfishes)
        • Subfamily Scombrinae Rafinesque 1815 (mackerels)
      • Family Caristiidae Gill & Smith 1905 (manefishes)
      • Family Bramidae Bonaparte 1831 (pomfrets)
      • Family Scombrolabracidae Fowler 1925 (longfin escolars or black mackerels)
      • Family Gempylidae Gill 1862 (snake mackerels)
      • Family Trichiuridae Rafinesque 1810 (cutlassfishes)
        • Subfamily Aphanopodinae Gill 1863 (frostfishes)
        • Subfamily Lepidopodinae Gill 1863 (scabbardfishes)
        • Subfamily Trichiurinae Rafinesque 1810 (hairtails)
  • Order Synbranchiformes
    • Suborder Mastacembeloidei
      • Family Mastacembelidae Swainson 1839 (freshwater spiny-eels)
      • Family Chaudhuriidae Annandale 1918 (earthworm eels)
    • Suborder Indostomoidei
      • Family Indostomidae Prashad & Mukerji 1929 (armored sticklebacks)
    • Suborder Synbranchoidei
      • Family Synbranchidae Bonaparte 1835 (swamp eels)
  • Order Anabantiformes
    • Suborder Anabantoidei
      • Family Anabantidae Bonaparte 1831 (climbing gouramies)
      • Family Helostomatidae Gill 1872 (kissing gouramies)
      • Family Osphronemidae van der Hoeven 1832 (gouramies)
        • Subfamily Belontiinae Liem 1962 (combtail gouramies)
        • Subfamily Osphroneminae van der Hoeven 1832 (giant gouramies)
        • Subfamily Luciocephalinae Bleeker 1852 (spiral egg gouramies)
        • Subfamily Trichogastrinae Bleeker 1879 (threadfishes)
        • Subfamily Macropodusinae Hoedeman 1948 (paradise fishes and fighting fishes)
    • Suborder Channoidei
      • Family Aenigmachannidae Britz, Dahanukar, Anoop, Philip, Clark, Raghavan & Rüber 2020 (Gollum snakehead fishes)
      • Family Channidae Fowler 1934 (1831) (snakeheads)
    • Suborder Nandoidei
      • Family Nandidae Bleeker 1852 (Asian leaffishes)
      • Family Badidae Barlow, Liem & Wickler 1968 (chameleon fishes)
      • Family Pristolepididae Regan 1913 (mudperches)
  • Order Carangiformes
    • Suborder Centropomoidei
      • Family Latidae Jordan 1888 (giant perches)
      • Family Centropomidae Poey 1967 (snooks)
      • Family Lactariidae Boulenger 1904 (false trevallies)
      • Family Sphyraenidae Rafinesque 1815 (barracudas)
    • Suborder Pleuronectoidei
      • Family Polynemidae Rafinesque 1815 (threadfins or tassel-fishes)
      • Family Psettodidae Regan 1910 (spiny turbots)
      • Family Citharidae de Buen 1935 (largescale flounders)
      • Family Scophthalmidae Chabanaud 1933 (turbots)
      • Family Cyclopsettidae Campbell et al. 2019 (sand whiffs or large-tooth flounders)
      • Family Bothidae Smitt 1892 (lefteye flounders)
      • Family Paralichthyidae Regan 1910 (sand flounders)
      • Family Pleuronectidae Rafinesque 1815 (righteye flounders)
        • Subfamily Atheresthinae Vinnikov, Thomson & Munroe 2018
        • Subfamily Pleuronichthyinae Vinnikov, Thomson & Munroe 2018
        • Subfamily Microstominae Cooper & Chapleau 1998 (smallmouth flounders)
        • Subfamily Hippoglossinae Gill 1864 (halibuts)
        • Subfamily Pleuronectinae Rafinesque 1815 (true flounders)
      • Family Paralichthodidae Regan 1920 (peppered flounders)
      • Family Oncopteridae Jordan & Goss 1889 (remo flounders)
      • Family Rhombosoleidae Regan 1910 (South Pacific flounders)
      • Family Achiropsettidae Heemstra 1990 (southern flounders or armless flounders)
      • Family Achiridae Rafinesque 1815 (American soles)
      • Family Samaridae Jordan & Goss 1889 (crested flounders)
      • Family Poecilopsettidae Norman 1934 (bigeye flounders)
      • Family Soleidae Bonaparte 1833 (soles)
      • Family Cynoglossidae Jordan 1888 (tonguefishes)
        • Subfamily Symphurinae Ochiai 1963 (straightsnout tongue soles)
        • Subfamily Cynoglossinae Jordan 1888 (hookedsnout tongue soles)
    • Suborder Toxotoidei
      • Family Leptobramidae Ogilby 1913 (beachsalmons)
      • Family Toxotidae Bleeker 1859 (archerfishes)
    • Suborder Nematistioidei
      • Family Nematistiidae Gill 1862 (roosterfishes)
    • Suborder Menoidei
      • Family Menidae Fitzinger 1873 (moonfishes)
      • Family Xiphiidae Rafinesque 1815 (swordfishes)
      • Family Istiophoridae Rafinesque 1815 (billfishes and marlins)
    • Suborder Carangoidei
      • Family Carangidae Rafinesque 1815 (jacks or jack mackerels)
        • Subfamily Naucratinae Bleeker 1859 (amberjacks)
        • Subfamily Caranginae Rafinesque 1815 (trevallies and kingfishes)
        • Subfamily Scomberoidinae Jordan & Gilbert 1883 (leatherjackets and queenfishes)
        • Subfamily Trachinotinae Gill 1861 (pompanos)
      • Family Echeneidae Rafinesque 1810 (remoras and sharksuckers)
      • Family Rachycentridae Gill 1896 (cobias)
      • Family Coryphaenidae Rafinesque 1815 (dolphinfishes)
  • Order Atheriniformes
    • Family Atherinidae Risso 1827 (Old World silversides)
      • Subfamily Atherinomorinae Dyer & Chernoff 1996 (tropical silversides)
      • Subfamily Atherininae Risso 1827 (silversides)
      • Subfamily Craterocephalinae Dyer & Chernoff 1996 (hardyheads)
      • Subfamily Bleheratherininae Aarn & Ivantsoff 2009 (New Caledonian silversides)
    • Family Bedotiidae Jordan & Hubbs 1919 (Malagasy rainbowfishes)
    • Family Melanotaeniidae Gill 1894 (rainbowfishes)
    • Family Pseudomugilidae Kner 1867 (blue eyes)
    • Family Telmatherinidae Munro 1958 (sailfin silversides)
    • Family Notocheiridae Schultz 1950 (surf silversides)
    • Family Isonidae Rosen 1964 (surf sardines)
    • Family Atherionidae Schultz 1948 (pricklenose silversides)
    • Family Dentatherinidae Patten & Ivantsoff 1983 (tusked silversides)
    • Family Phallostethidae Regan 1916 (priapum fishes)
    • Family Atherinopsidae Fitzinger 1873 (New World silversides)
      • Subfamily Atherinopsinae Fitzinger 1873 (neotropical silversides)
      • Subfamily Menidiinae Schultz 1948 (Gulf of Mexico silversides)
  • Order Beloniformes
    • Family Scomberesocidae Bleeker 1858 (sauries)
    • Family Belonidae Bonaparte 1835 (needlefishes)
    • Family Hemiramphidae Gill 1859 (halfbeaks)
    • Family Zenarchopteridae Fowler 1934 (internally fertilized halfbeaks)
    • Family Exocoetidae Risso 1827 (flyingfishes)
    • Family Adrianichthyidae Weber 1913 (adrianichthyids)
      • Subfamily Oryziinae Myers 1938 (medakas or ricefishes)
      • Subfamily Adrianichthyinae Weber 1913 (adrianichthyines)
  • Order Cyprinodontiformes
    • Suborder Aplocheiloidei
      • Family Aplocheilidae Bleeker 1859 (Old World rivulins)
      • Family Nothobranchiidae Garman 1895 (African rivulins)
      • Family Rivulidae Myers 1925 (New World rivulins)
        • Subfamily Rivulinae Myers 1925 (rivulines)
        • Subfamily Kryptolebiatinae Costa 2004 (mangrove killifishes)
        • Subfamily Cynolebiinae Hoedeman 1961 (pearl killifishes)
    • Suborder Cyprinodontoidei
      • Family Pantanodontidae Myers 1955 (spine killifishes)
      • Family Fundulidae Günther 1866 (topminnows and killifishes)
      • Family Cyprinodontidae Wagner 1828 (killifishes)
        • Subfamily Cubanichthyinae Parenti 1981 (island pupfishes)
        • Subfamily Cyprinodontinae Wagner 1828 (pupfishes)
        • Subfamily Orestiinae Bleeker 1859 (Andean killifishes)
      • Family Profundulidae Hoedeman & Bronner 1951 (Middle American killifishes)
      • Family Goodeidae Jordan & Gilbert 1883 (splitfins)
        • Subfamily Empetrichthyinae Jordan, Evermann & Clark 1930 (springfishes)
        • Subfamily Goodeinae Jordan & Gilbert 1883 (Mexican splitfins)
      • Family Fluviphylacidae Roberts 1970 (American lampeyes)
      • Family Poeciliidae Bonaparte 1831 (poeciliids)
        • Subfamily Xenodexiinae Hubbs 1950 (Guatemalan poeciliids)
        • Subfamily Tomeurinae Eigenmann 1912 (facultative viviparous poeciliids)
        • Subfamily Poeciliinae Bonaparte 1831 (livebearers)
      • Family Anablepidae Bonaparte 1831 (four-eyed fishes and onesided livebearers)
        • Subfamily Anablepinae Bonaparte 1831 (four-eyed fishes)
        • Subfamily Oxyzygonectinae Parenti 1981 (white-eyes)
      • Family Aphaniidae Hoedeman 1949 (Oriental killifishes)
      • Family Valenciidae Parenti 1981 (European killifishes)
      • Family Procatopodidae Fowler 1916 (African lampeyes)
        • Subfamily Aplocheilichthyinae Myers 1928 (banded lampeyes)
        • Subfamily Procatopodinae Fowler 1916 (lampeyes)
  • Order Cichliformes
    • Family Polycentridae Gill 1858 (leaffishes)
    • Family Cichlidae Bonaparte 1835 (cichlids)
      • Subfamily Etroplinae Kullander 1998 (Indian and Madagascan cichlids)
      • Subfamily Ptychochrominae Sparks 2004 (Malagasy cichlids)
      • Subfamily Pseudocrenilabrinae Fowler 1934 (African cichlids)
      • Subfamily Cichlinae Bonaparte 1835 (American cichlids)
    • Family Pholidichthyidae Jordan 1896 (convict-blennies)
  • Order Mugiliformes
    • Family Ambassidae Klunzinger 1870 (Asiatic glassfishes)
    • Family Mugilidae Jarocki 1822 (mullets)
  • Order Blenniiformes
    • Family Pseudochromidae Müller & Troschel 1849 (dottybacks)
      • Subfamily Pseudochrominae Müller & Troschel 1849
      • Subfamily Pseudoplesiopinae Bleeker 1875
      • Subfamily Anisochrominae Smith 1954
      • Subfamily Congrogadinae Günther 1862 (eelblennies)
      • Subfamily Assiculinae Gill 2013
      • Subfamily Assiculoidinae Gill 2013
    • Family Plesiopidae Günther 1861 (roundheads)
      • Subfamily Plesiopinae Günther 1861
      • Subfamily Acanthoclininae Günther 1861 (spiny basslets)
    • Family Pomacentridae Bonaparte 1831 (damselfishes and anemonefishes)
      • Subfamily Microspathodontinae Jordan & Evermann 1898 (giant damselfishes)
      • Subfamily Chrominae Bonaparte 1831 (chromises)
      • Subfamily Glyphisodontinae Rafinesque 1815 (sergeants majors)
      • Subfamily Pomacentrinae Bonaparte 1831 (anemonefishes or clownfishes)
    • Family Embiotocidae Agassiz 1853 (surfperches)
    • Family Grammatidae Jordan 1887 (gramma basslets)
    • Family Opistognathidae Bonaparte 1835 (jawfishes)
  • Suborder Gobiesocoidei
    • Family Gobiesocidae Bleeker 1859 (clingfishes)
      • Subfamily Diplocrepinae Briggs 1955
      • Subfamily Lepadogastrinae Canestrini 1871-72
      • Subfamily Chorisochisminae Briggs 1955
      • Subfamily Haplocylicinae Briggs 1955
      • Subfamily Protogobiesocinae Fricke, Chen & Chen 2016 (ancestral clingfishes)
      • Subfamily Cheilobranchinae Günther 1870 (shore-eels)
      • Subfamily Trachelochisminae Briggs 1955
      • Subfamily Diademichthyinae Whitley 1950
      • Subfamily Gobiesocinae Bleeker 1859 (New World clingfishes)
  • Suborder Blennioidei
    • Family Tripterygiidae Whitley 1931 (triplefins or threefin blennies)
      • Subfamily Notoclininae Fricke 2009
      • Subfamily Tripterygiinae Whitley 1931
    • Family Blenniidae Rafinesque 1810 (combtooth blennies)
      • Subfamily Blenniinae Rafinesque 1810 (blennies)
      • Subfamily Salariinae Gill 1859 (salariin blennies)
    • Family Clinidae Swainson 1839 (kelp blennies)
    • Family Labrisomidae Clark Hubbs 1952 (labrisomid blennies)
    • Family Chaenopsidae Gill 1865 (pikeblennies or tube blennies)
    • Family Dactyloscopidae Gill 1859 (sand stargazers)
  • Order Perciformes
    • Suborder Percoidei
      • Family Serranidae Swainson 1839 (sea basses)
      • Family Anthiadidae Poey 1861 (fairy basslets or streamer basses)
      • Family Epinephelidae Bleeker 1874 (groupers)
      • Family Liopropomatidae Poey 1867 (painted basslets)
        • Subfamily Liopropomatinae Poey 1867
        • Subfamily Diploprioninae Bleeker 1874 (barred soapfishes)
      • Family Grammistidae Bleeker 1857 (soapfishes)
      • Family Percidae Rafinesque 1815 (perches and darters)
        • Subfamily Percinae Rafinesque 1815 (freshwater perches)
        • Subfamily Luciopercinae Jordan & Evermann 1896 (pikeperches and Danube perches)
        • Subfamily Etheostomatinae Agassiz 1850 (North American darters)
      • Family Niphonidae Jordan 1923 (Ara groupers)
      • Family Trachinidae Rafinesque 1815 (weeverfishes)
      • Family Bembropidae Regan 1913 (flatheads or duckbill flatheads)
    • Suborder Notothenioidei
      • Family Percophidae Swainson 1839 (Brazilian flatheads)
      • Family Bovichtidae Gill 1862 (thornfishes)
      • Family Pseudaphritidae McCulloch 1929 (congollis)
      • Family Eleginopidae Gill 1893 (Patagonian blennies or Falkland Islands blennies)
      • Family Nototheniidae Günther 1861 (cod icefishes)
        • Subfamily Pleuragrammatinae Andersen & Hureau 1979
        • Subfamily Nototheniinae Günther 1861 (notothens)
        • Subfamily Trematominae Balushkin 1982
      • Family Harpagiferidae Gill 1861 (plunderfishes)
        • Subfamily Harpagiferinae Gill 1861 (spiny plunderfishes)
        • Subfamily Artedidraconinae Andriashev 1967 (barbeled plunderfishes)
      • Family Bathydraconidae Regan 1913 (Antarctic dragonfishes)
        • Subfamily Bathydraconinae Regan 1913
        • Subfamily Gymnodraconinae Andriashev 1983
        • Subfamily Cygnodraconinae no valid family-group name description
      • Family Channichthyidae Gill 1861 (crocodile icefishes)
    • Suborder Scorpaenoidei
      • Family Platycephalidae Swainson 1839 (flatheads)
      • Family Hoplichthyidae Kaup 1873 (spiny flatheads)
      • Family Triglidae Rafinesque 1815 (searobins)
        • Subfamily Prionotinae Kaup 1873 (spiny searobins)
        • Subfamily Peristediinae Jordan & Gilbert 1883 (armored gurnards)
        • Subfamily Pterygotriglinae Fowler 1938 (spotted gurnards)
        • Subfamily Triglinae Rafinesque 1815 (gurnards)
      • Family Bembridae Kaup 1873 (deepwater flatheads)
      • Family Synanceiidae Swainson 1839 (stonefishes)
        • Subfamily Apistinae Gill 1859 (wasp scorpionfishes)
        • Subfamily Perryeninae Honma, Imamura & Kawai 2013 (whitenose pigfishes)
        • Subfamily Eschmeyerinae Mandrytsa 2001 (cofishes)
        • Subfamily Gnathanacanthinae Gill 1892 (red velvetfishes)
        • Subfamily Aploactininae Jordan & Starks 1904 (velvetfishes)
        • Subfamily Pataecinae Gill 1872 (prowfishes)
        • Subfamily Tetraroginae Smith 1949 (waspfishes)
        • Subfamily Choridactylinae Kaup 1859 (stingers)
        • Subfamily Synanceiinae Swainson 1839 (stonefishes)
      • Family Neosebastidae Matsubara 1943 (gurnard scorpionfishes)
      • Family Plectrogeniidae Fowler 1938 (stinger flatheads)
      • Family Scorpaenidae Risso 1827 (scorpionfishes)
        • Subfamily Scorpaeninae Risso 1827 (scorpionfishes)
        • Subfamily Caracanthinae Gill 1885 (coral crouchers)
        • Subfamily Pteroinae Kaup 1873 (turkeyfishes and lionfishes)
        • Subfamily Setarchinae Matsubara 1943 (deepsea bristly scorpionfishes)
        • Subfamily Sebastolobinae Matsubara 1943 (thornyheads)
        • Subfamily Sebastinae Kaup 1873 (rockfishes)
      • Family Congiopodidae Gill 1889 (racehorses or pigfishes)
      • Family Zanclorhynchidae Andriashev 1993 (horsefishes)
      • Family Normanichthyidae Clark 1937 (barehead scorpionfishes)
    • Suborder Cottoidei
      • Family Anoplopomatidae Jordan & Gilbert 1883 (sablefishes)
      • Family Zaniolepididae Jordan & Gilbert 1883 (combfishes)
      • Family Hexagrammidae Jordan 1888 (greenlings)
        • Subfamily Hexagramminae Jordan 1888 (greenlings)
        • Subfamily Pleurogramminae Rutenberg 1954 (Atka mackerels)
        • Subfamily Ophiodontinae Jordan & Gilbert 1883 (lingcods)
        • Subfamily Oxylebiinae Gill 1862 (painted greenlings)
      • Family Rhamphocottidae Jordan & Gilbert 1883 (horsehead sculpins or grunt sculpins)
      • Family Jordaniidae Jordan & Evermann 1898 (longfin sculpins)
      • Family Cottidae Bonaparte 1831 (sculpins)
      • Family Psychrolutidae Günther 1861 (marine sculpins)
      • Family Agonidae Swainson 1839 (poachers)
        • Subfamily Agoninae Swainson 1839 (sturgeon poachers)
        • Subfamily Anoplagoninae Gill 1861 (alligator fishes)
        • Subfamily Bathyagoninae Lindberg 1971 (starsnouts)
        • Subfamily Brachyopsinae Jordan & Evermann 1898 (uppermouth poachers)
        • Subfamily Hypsagoninae Gill 1861 (dragon poachers)
        • Subfamily Bothragoninae Lindberg 1971 (rockheads)
        • Subfamily Hemitripterinae Gill 1865 (sailfin sculpins)
      • Family Trichodontidae Bleeker 1859 (sandfishes)
      • Family Cyclopteridae Bonaparte 1831 (lumpfishes)
        • Subfamily Cyclopterinae Bonaparte 1831 (lumpsuckers)
        • Subfamily Liparopsinae Garman 1892 (smooth lumpsuckers)
        • Subfamily Eumicrotreminae Oku, Imamura & Yabe 2017 (spiny lumpsuckers)
      • Family Liparidae Gill 1861 (snailfishes)
    • Suborder Gasterosteoidei
      • Family Hypoptychidae Steindachner 1880 (sand-eels)
      • Family Gasterosteidae Bonaparte 1831 (sticklebacks)
      • Family Aulorhynchidae Gill 1861 (tubesnouts)
    • Suborder Zoarcoidei
      • Family Zoarcidae Swainson 1839 (eelpouts)
        • Subfamily Lycodinae Gill 1861
        • Subfamily Lycozoarcinae Andriashev 1939
        • Subfamily Zoarcinae Swainson 1839 (eelpouts)
        • Subfamily Gymnelinae Gill 1863 (pouts)
      • Family Anarhichadidae Bonaparte 1835 (wolffishes)
      • Family Neozoarcidae Jordan & Snyder 1902
      • Family Eulophiidae Smith 1902
      • Family Stichaeidae Gill 1864 (pricklebacks)
        • Subfamily Stichaeinae Gill 1864
        • Subfamily Chirolophinae Jordan & Evermann 1898
        • Subfamily Alectriinae Makushok 1958 (cockscombs)
        • Subfamily Xiphisterinae Jordan 1880
      • Family Lumpenidae Jordan & Evermann 1898 (eel pricklebacks)
      • Family Opisthocentridae Jordan & Evermann 1898
      • Family Pholidae Gill 1893 (gunnels)
        • Subfamily Pholinae Gill 1893 (pigmented gunnels)
        • Subfamily Apodichthyinae Hubbs 1927 (penpoint gunnels)
      • Family Ptilichthyidae Jordan & Gilbert 1883 (quillfishes)
      • Family Zaproridae Jordan 1896 (prowfishes)
      • Family Cryptacanthodidae Gill 1861 (wrymouths)
      • Family Cebidichthyidae Gill 1862 (monkeyface pricklebacks)
      • Family Scytalinidae Jordan & Starks 1895 (graveldivers)
      • Family Bathymasteridae Jordan & Gilbert 1883 (ronquils)
  • Order Centrarchiformes
    • Suborder Percalatoidei
      • Family "Percalates-clade" (Australian basses)
    • Suborder Terapontoidei
      • Family Girellidae Gill 1862 (nibblers)
      • Family Scorpididae Günther 1860 (halfmoons)
      • Family Kyphosidae Jordan 1887 (sea chubs)
      • Family Kuhliidae Jordan & Evermann 1896 (flagtails or aholeholes)
      • Family Terapontidae Richardson 1842 (grunters or tigerfishes)
      • Family Dichistiidae Smith 1935 (galjoens)
      • Family Oplegnathidae Bleeker 1853 (knifejaws)
      • Family Caesioscorpididae Parenti & Randall 2020 (blowhole perches)
      • Family Microcanthidae Bleeker 1876 (stripeys)
    • Suborder Centrarchoidei
      • Family Centrarchidae Bleeker 1859 (sunfishes and freshwater basses)
        • Subfamily Centrarchinae Bleeker 1859
        • Subfamily Lepominae Gill 1864
      • Family Elassomatidae Jordan 1877 (pygmy sunfishes)
      • Family Sinipercidae Jordan & Richardson 1910 (Chinese perches)
      • Family Enoplosidae Gill 1893 (oldwives)
      • Family Percichthyidae Jordan & Eigenmann 1890 (temperate basses)
      • Family Perciliidae Jordan 1923 (southern basses)
      • Family Parascorpididae Smith 1949 (jutjaws)
    • Suborder Cirrhitioidei
      • Family Cirrhitidae Macleay 1841 (hawkfishes)
      • Family Chironemidae Gill 1862 (kelpfishes)
      • Family Aplodactylidae Günther 1859 (marblefishes)
      • Family Cheilodactylidae Bonaparte 1850 (fingerfins)
      • Family Latridae Gill 1862 (trumpeters)
  • Order Labriformes
    • Suborder Labroidei
      • Family Centrogenyidae Fowler 1907 (false scorpionfishes)
      • Family Labridae Cuvier 1816 (wrasses)
      • Family Odacidae Günther 1861 (cales)
    • Suborder Uranoscopoidei
      • Family Ammodytidae Bonaparte 1835 (sand lances)
      • Family Uranoscopidae Bonaparte 1831 (stargazers)
      • Family Leptoscopidae Gill 1859 (southern sandfishes)
      • Family Pinguipedidae Günther 1860 (sandperches)
      • Family Cheimarrichthyidae Regan 1913 (New Zealand torrentfishes)
  • Order Acropomatiformes
    • Family Scombropidae Gill 1862 (gnomefishes)
    • Family Ostracoberycidae Fowler 1934 (shellskin alfonsinos)
    • Family Acropomatidae Gill 1893 (lanternbellies)
    • Family Symphysanodontidae Katayama 1984 (slopefishes)
    • Family Epigonidae Poey 1861 (deepwater cardinalfishes)
    • Family Howellidae Ogilby 1899 (lanternbellies or oceanic basslets)
    • Family Polyprionidae Bleeker 1874 (wreckfishes)
    • Family Lateolabracidae Ghedotti, Davis and Smith 2018 (Asian seaperches)
    • Family Glaucosomatidae Jordan & Thompson 1911 (pearl perches)
    • Family Pempheridae Bleeker 1859 (sweepers)
    • Family Dinolestidae Whitley 1948 (longfinned pikes)
    • Family Stereolepididae Smith, Ghedotti & Davis 2022 (giant sea basses)
    • Family Banjosidae Jordan & Thompson 1912 (banjofishes)
    • Family Pentacerotidae Bleeker 1859 (armorheads)
      • Subfamily Histiopterinae Bleeker 1876 (sailfin armorheads)
      • Subfamily Pentacerotinae Bleeker 1859
    • Family Malakichthyidae Jordan & Richardson 1910 (temperate ocean-basses)
    • Family Champsodontidae Jordan & Snyder 1902 (gapers)
    • Family Hemerocoetidae Kaup 1873 (Indo-Pacific duckbills)
    • Family Creediidae Waite 1899 (sand burrowers)
    • Family Synagropidae Smith 1961 (splitfin ocean-basses)
    • Family Bathyclupeidae Gill 1896 (deepsea herrings)
  • Order Acanthuriformes
    • Family Gerreidae Bleeker 1859 (mojarras)
    • Family Sillaginidae Richardson 1846 (sillagos)
    • Family Moronidae Jordan & Evermann 1896 (white basses or temperate basses)
    • Family Drepaneidae Gill 1872 (sicklefishes)
    • Family Ephippidae Bleeker 1859 (spadefishes and batfishes)
    • Family Sciaenidae Cuvier 1829 (croakers and drums)
    • Family Dinopercidae Heemstra & Hecht 1986 (cavebasses)
    • Family Haemulidae Gill 1885 (grunts)
      • Subfamily Haemulinae Gill 1885
      • Subfamily Plectorhinchinae Jordan & Thompson 1912 (sweetlips)
    • Family Lobotidae Gill 1861 (tripletails and tigerperches)
    • Family Monodactylidae Jordan & Evermann 1898 (moonies)
    • Family Emmelichthyidae Poey 1867 (rovers)
    • Family Lutjanidae Gill 1861 (snappers)
      • Subfamily Apsilinae Johnson 1980
      • Subfamily Etelinae Gill 1893 (snappers)
      • Subfamily Paradicichthyinae Whitley 1930 (sailfin snappers)
      • Subfamily Lutjaninae Gill 1861 (snappers & fusiliers)
    • Family Malacanthidae Poey 1861 (tilefishes or sand tilefishes)
    • Family Latilidae Gill 1862 (deepwater tilefishes)
    • Family Pomacanthidae Jordan & Evermann 1898 (angelfishes)
    • Family Chaetodontidae Rafinesque 1815 (butterflyfishes)
      • Subfamily Heniochinae Kaup 1860 (bannerfishes)
      • Subfamily Chaetodontinae Rafinesque 1815 (butterflyfishes)
    • Family Leiognathidae Gill 1893 (ponyfishes or slipmouths)
      • Subfamily Leiognathinae Gill 1893
      • Subfamily Gazzinae Chakrabarty & Sparks 2015
    • Family Luvaridae Gill 1885 (luvars)
    • Family Zanclidae Bleeker 1876 (Moorish idols)
    • Family Acanthuridae Bonaparte 1835 (surgeonfishes and unicornfishes)
    • Family Callanthiidae Ogilby 1899 (splendid perches)
    • Family Nemipteridae Regan 1913 (threadfin breams and spinycheeks)
    • Family Lethrinidae Bonaparte 1831 (emperor snappers)
      • Subfamily Lethrininae Bonaparte 1831 (emperors)
      • Subfamily Monotaxinae Akazaki 1961 (big-eye seabreams)
    • Family Sparidae Rafinesque 1818 (porgys and seabreams)
    • Family Siganidae Richardson 1837 (rabbitfishes)
    • Family Scatophagidae Gill 1883 (scats)
    • Family Cepolidae Rafinesque 1815 (bandfishes)
      • Subfamily Cepolinae Rafinesque 1815
      • Subfamily Owstoniinae Jordan, Tanaka & Snyder 1913
    • Family Priacanthidae Günther 1859 (bigeyes)
    • Family Caproidae Bonaparte 1835 (boarfishes)
    • Family Antigoniidae Jordan & Evermann 1898 (deepwater boarfishes)
  • Order Lophiiformes
    • Suborder Lophioidei
      • Family Lophiidae Rafinesque 1810 (goosefishes or monkfishes)
    • Suborder Ogcocephaloidei
      • Family Ogcocephalidae Gill 1893 (batfishes)
    • Suborder Antennarioidei
      • Family Rhycheridae Hart, Arnold, Alda, Kenaley, Pietsch, Hutchinson & Chakrabarty 2022 (Balrog frogfishes)
      • Family Brachionichthyidae Gill 1863 (warty anglerfishes)
      • Family Antennariidae Jarocki 1822 (Fibonacci frogfishes)
      • Family Histiophrynidae Arnold & Pietsch 2012 (starfingered frogfishes)
      • Family Tathicarpidae Hart, Arnold, Alda, Kenaley, Pietsch, Hutchinson & Chakrabarty 2022 (longfin frogfishes)
      • Family Tetrabrachiidae Regan 1912 (tetrabrachiid frogfishes)
      • Family Lophichthyidae Boeseman 1964 (lophichthyid frogfishes)
    • Suborder Chaunacoidei
      • Family Chaunacidae Gill 1863 (gapers or sea toads)
    • Suborder Ceratioidei
      • Family Caulophrynidae Goode & Bean 1896 (fanfins)
      • Family Neoceratiidae Regan 1926 (needlebeard seadevils or spiny seadevils)
      • Family Melanocetidae Gill 1878 (black seadevils)
      • Family Himantolophidae Gill 1861 (footballfishes)
      • Family Diceratiidae Regan & Trewavas 1932 (doublespine seadevils)
      • Family Oneirodidae Gill 1878 (dreamers)
      • Family Thaumatichthyidae Smith & Radcliffe 1912 (wolftrap seadevils)
      • Family Centrophrynidae Bertelsen 1951 (prickly seadevils)
      • Family Ceratiidae Gill 1861 (seadevils)
      • Family Gigantactinidae Boulenger 1904 (whipnose seadevils)
      • Family Linophrynidae Regan 1925 (leftvent seadevils)
  • Order Tetraodontiformes
    • Suborder Triacanthodoidei
      • Family Triacanthodidae Gill 1862 (spikefishes)
      • Family Triacanthidae Bleeker 1859 (triplespines)
    • Suborder Tetraodontoidei
      • Family Triodontidae Bleeker 1859 (threetooth puffers)
      • Family Molidae Bonaparte 1832 (molas or ocean sunfishes)
      • Family Diodontidae Billberg 1833 (porcupinefishes and burrfishes)
      • Family Tetraodontidae Bonaparte 1831 (puffers)
    • Suborder Balistoidei
      • Family Aracanidae Hollard 1860 (deepwater boxfishes)
      • Family Ostraciidae Rafinesque 1810 (boxfishes)
      • Family Monacanthidae Nardo 1843 (filefishes)
      • Family Balistidae Rafinesque 1810 (triggerfishes)
  • Class Coelacanthi
    • Order Coelacanthiformes
      • Family Latimeriidae Berg 1940 (coelacanths)
  • Class Dipneusti
    • Order Ceratodontiformes
      • Family Neoceratodontidae Schultz 1948 (Australian lungfishes)
      • Family Lepidosirenidae Bonaparte 1841 (South American lungfishes)
      • Family Protopteridae Peters 1855 (African lungfishes)
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Eschmeyer's Catalog of Fishes Online Database
Annotated Checklists of Fishes

This series serves to provide the most up-to-date taxonomic treatment of the families of recent fishes.

Ichthyology at the Academy

The Department of Ichthyology is home to one of the largest and most important collections of fishes in the world, and is designated as one of eight International Centers for Ichthyology in North America. Meet the researchers, explore projects and expeditions, and more.