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Artistic rendering of an ancient shark, Helicoprion.
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Illustration of Helicoprion

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Off the coast of North Carolina, Nizinski and Johnson Sea Link pilot Phil Santos descend through the water column towards the target site.
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Submersible and Deep-Sea Corals

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Smithsonian zoologist Dr. Steve Cairns named and described this deep-sea coral species, Stephanocyathus paliferus, now preserved at the National Museum of Natural History.
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Corals at the Smithsonian

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A submersible’s robotic arm collects gold coral in the Hawaiian Islands. Similar specimens have been dated at more than 2,700 years old.
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Collecting Gold Coral from the Deep Sea

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A male mudflat fiddler crab (Uca rapax) waves its huge claw to impress females and threaten competitors.
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The Mudflat Fiddler Crab

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Dr. Clyde Roper in a one-person submersible.
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One-Person Submersible

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A giant squid dissection
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Dissecting a Giant Squid

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Close-up photograph of an arrow squid embryo.
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Squid Embryo

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In some reefs, small fishes such as this broad-barred goby protect corals by eating invading seaweeds.
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Coral Goby Cleans Coral

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An unidentified moray eel held in researcher's hands.
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A Baby Moray Eel, or a Really Small Adult?

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Dr. Robert Ballard with an ROV
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Dr. Robert Ballard

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Two nurse sharks hover over a baited cage
Lesson Plan

Symbiosis and Coral Anatomy

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