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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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Two nurse sharks hover over a baited cage
Lesson Plan

Off Base

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Found 1,751 m (5,745 ft) below the surface of Hawaii’s waters in 2007, this orange bamboo coral is 1.2–1.5 m (4–5 ft) tall.
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New Genus of Bamboo Coral

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A white fleck of plastic is engulfed by a coral polyp.
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Coral Eating Piece of Plastic

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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 crab next to a coral den
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Crabs Make Coral Castles

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dead coral from disease
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Diseased Coral Polyps

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A rendering of an underwater marine scene depicting life ~145-65 million years ago, when rudist clams were the major reef builders.
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Carbonate Reef (Cretaceous Period: 145 - 65 Million Years Ago)

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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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A bluefin trevally swims in Hawaii’s Maro Coral Reef, part of the Papahānaumokuākea Marine National Monument.
Slideshow

Two Views of Coral Reefs: Thriving and Threatened

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