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Two nurse sharks hover over a baited cage
Lesson Plan

Coral Conservation

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Gerardia, or gold coral, species often have a tree-like shape, as evident in this specimen.
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Gold Coral

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A brittle star clings to the branches of a deep sea coral
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Brittle Star Coral Mutualism

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A pair of French Angelfish (Pomacanthus paru) swim off the coast of Brazil.
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Pair of Angelfish

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Tree corals like this Calyptrophora bayer can grow several meters high and resemble brightly colored trees.
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Red Tree Coral

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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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This black coral is more than 4,200 years old. Named for the color of their skeletons, black corals come in many colors.
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How old is black coral?

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This map shows where some of the most significant species of deep-sea corals are located.
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Deep-Sea Corals Worldwide

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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 net used to trawl the ocean floor scooped up this large specimen of deep-sea coral.
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Coral Trapped in Trawler Net

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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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Scientist Martha Nizinski examines a sample of the deep-sea coral Lophelia pertusa, collected 600-m (1,969-ft) deep off the coast of the southeastern United States.
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Deep-Sea Coral Sample

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