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An underwater photo of a yellow-mouth moray eel.
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Yellow-mouth Moray Eel in the Red Sea (Eilat, Israel)

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Orange and red deep-sea corals.
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Aleutian Coral Reef

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The staghorn coral is listed as Threatened under the U.S. Endangered Species Act. It is one of 22 coral species listed.
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Staghorn Coral

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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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Many species of pink coralline algae, which cements coral reefs together, cover a reef surface in the Southern Line Islands.
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Pink Coralline Algae

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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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Coral showing signs of disease
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Disease Takes Hold

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dead coral from disease
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Diseased Coral Polyps

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This Caribbean sea anemone brightens a variety of Caribbean reef habitats.
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Sea Anemone

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a skeleton of a button coral that looks like a snow flake
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Button Coral

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Staghorn Coral
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Staghorn Coral in a Hurricane

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A sea lion in the Sea of Cortez observes Auster as he observes reef fishes.
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Auster Diving with Sea Lion

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