When diving in deep coral reefs, scientists breathe a mixture that includes helium. That makes for some interesting conversations.

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Elliott Jessup on a Philippines twilight zone dive
2014 Philippine Biodiversity Expedition

Academy scientists suspect the Verde Island Passage may be “the center of the center” of marine biodiversity.

Vibrantly colored corals and fish contrast with a dark background in a large tank within the Twilight Zone exhibit at Cal Academy

Life in technicolor: Neon-hued fish and corals abound in Twilight Zone’s vivid habitats.

Twilight Zone: Deep Reefs Revealed

Candy colors. Ingenious adaptations. Extreme conditions. Meet the unusual animals that inhabit deep reefs.

TZ pressure
Pressure in the Twilight Zone

Scientists use advanced rebreather technology for deep dives into unexplored areas of the ocean.

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