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A school of Hawaiian squirrelfish.
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A School of Hawaiian Squirrelfish

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Two coral trout swim on a reef in Fiji.
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Coral Trout in a Fiji Reef

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Colorful corals and brittlestars on Manning Seamount off the New England coast.
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Manning Seamount Deep Coral Communities

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Valentinni's sharpnose puffer lives on Indo-Pacific coral reefs, where it shoals in groups of 10-100 puffers and feeds on algae and tunicates.
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Valentinni's Sharpnose Puffer

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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 purple hard coral releases bundles of pink eggs glued together with sperm.
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Coral Spawning

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Grey reef sharks are among the most versatile and tough predators on a Pacific coral reef, but they are also among the most vulnerable species, as they are threatened by wasteful fishing practices like shark finning.
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Grey Reef Shark in the Line Islands

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 Scientist Martha Nizinski holds a specimen of a fan sponge (Phakellia sp.) collected at a deep-sea coral study site off the coast of South Carolina.    
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Fan Sponge

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What is coral? The answer is coral is an animal. This cutaway diagram of a coral polyp shows the location of its photosynthetic algae, or zooxanthellae, which coral needs to survive.
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What Is Coral? A Coral Polyp and Zooxanthellae

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In the X-ray image of this Viper Moray Eel (Enchelynassa canina), note the second set of jaws in the “throat”; these are the gill arches, which are present in all fish.
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X-Ray Image of a Viper Moray Eel

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The Line Islands are one of the most remote places in the Pacific Ocean.
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Expedition to the Line Islands

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stony corals among sea fans
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Ancient Reefs Reveal Glimpse at Future Oceans

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