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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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Orange and red deep-sea corals.
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Aleutian Coral 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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These corals are dead—smothered in sediments and overgrown with algae.
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Dead Coral Overgrown with Algae

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These bleached corals in the Gulf of Mexico are the result of increased water temperatures.
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Bleached Corals

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Shallow water coral reefs straddle the equator worldwide.
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Global Distribution of Shallow Coral Reef Ecosystems

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Researchers adopted the “yabbie pump,” the long silver tool shown here, from Australian fishing gear.
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Collecting Shallow-Water Specimens with the "Yabbie Pump"

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Red coral necklaces in a display window. Harvesting deep-sea coral to produce jewelry like this threatens these ecosystems.
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Coral for Sale

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Scientists recently discovered the Christmas tree coral (Antipathes dendrochristos) off the southern California coast.
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New Christmas Tree 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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Photo of coral polyp, with a single bleach polyp.
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Corals Threatened by Acid Seas

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Rockfish, anemones and other invertebrates inhabit this deep-sea coral reef in Cordell Bank National Marine Sanctuary.
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Deep-Sea Coral Habitat

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