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Tiny sponge spicules.
Photo

Sparkling Sponge Spicules

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This orange boring sponge (Cliona varians) overgrows several coral species at Panama's Smithsonian Tropical Studies Institute.
Article

Ocean Acidification Excites Boring Sponges

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Colorful fishes throng a reef in the Northwestern Hawaiian Islands.
Slideshow

Bizarre and Beautiful Coral Reef Animals

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Close-up photograph of translucent coral polyps, showing the symbiotic algae living inside.
Slideshow

Zooxanthellae and Coral Bleaching

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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.
Article

Martha Nizinski: Hooked on Deep-Sea Corals

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Dr. Brendan Roark discusses different methods of sampling deep-sea corals with undergraduate students at Texas A&M University.
Article

Coral Scientist Brendan Roark: On an Urgent Mission

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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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A piece of the Hyperbolic Crochet Coral Reef exhibit.
Article

When Art Meets Science: The Hyberbolic Crochet Coral Reef

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A fan-shaped colony of red coral (Corallium sp.) provides a perch for three basket stars as they feed.
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Red Coral

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

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Ari Daniel Shapiro and Dr.Randi Rotjan of the New England Aquarium, journey to the Phoenix Islands to study coral bleaching.
Audio

Coral Reefs: One Species at a Time

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dead coral from disease
Article

Sickness in the Sea: A Coral Plague Hits Florida

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