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: Black corals often resemble bushes or trees. Their living tissue can be one of several colors. It’s the skeleton that is black.
Article

Black Corals of the Deep

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A screenshot from video showing illustrations of ancient coral reefs.
Video

Coral Reefs Changing Over Time

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A sea lion in the Sea of Cortez observes Auster as he observes reef fishes.
Photo

Auster Diving with Sea Lion

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Coral reefs provide food for swarms of fish, both large and small.
Photo

Coral Reef in the Florida Keys

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Two nurse sharks hover over a baited cage
Lesson Plan

Keeping Watch on Coral Reefs

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Two nurse sharks hover over a baited cage
Lesson Plan

Caribbean Coral Reef and Climate Case Study

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This species of bamboo coral, discovered in 2004 in the Pacific Northwest, has unusually long and impressive tentacles.
Photo

New Bamboo Coral

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Unlike the shallow tropical coral reef at left, the deep-sea Oculina reef at right does not require sunlight.
Photo

Shallow and Deep-Sea Coral Reefs

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A zoomed-in image of the crown-of-thorns sea star.
Photo

Acanthaster planci

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corals polyps open and spawning
Article

Corals from the Deep Thrive under Aquarists Care

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A pearly razorfish
Photo

Pearly Razorfish

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Scientists recently discovered the Christmas tree coral (Antipathes dendrochristos) off the southern California coast.
Photo

New Christmas Tree Coral

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