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The branches of a primnoid coral in the genus Calyptrophora provide a habitat for galathaoid crabs.
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Primnoid Coral

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Unlike the shallow tropical coral reef at left, the deep-sea Oculina reef at right does not require sunlight.
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Shallow and Deep-Sea Coral Reefs

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A scuba diver explores elkhorn corals growing on a tropical reef.
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Exploring a Reef

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A close-up photo of dead man's fingers (Alcyonium digitatum), living in the Baltic Sea.
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Dead Man’s Fingers

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Dr. Stephen Cairns, a Smithsonian research zoologist, studies deep-water corals.
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Dr. Stephen Cairns

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A red snapper hunts for prey on Kingman’s Reef, a healthy reef in the Line Islands.
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Kingman’s Reef, Line Islands

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Colorful corals are disappearing in the Great Barrier Reef.
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Coral at the Great Barrier Reef

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A coral has just spawned. Each of the hundreds of polyps releases a small pink bundle of sperm and eggs.
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Coral Spawning by Moonlight

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A comparison of an undisturbed Oculina coral reef and one that has been devastated by trawling.
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Undisturbed vs. Trawled Reef

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A piece of the Hyperbolic Crochet Coral Reef exhibit.
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A Rainbow of Crocheted Corals

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Whitemouth morays hide in the crevices of Indo-Pacific coral reefs with only their heads (and white mouths) emerging, mouths agape, to breathe and hunt crustaceans and fish.
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Eel, Embedded

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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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