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a sea fan grows over dead coral
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Waving Sea Fans

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Two nurse sharks hover over a baited cage
Lesson Plan

Treasures in Jeopardy

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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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Unlike the shallow tropical coral reef at left, the deep-sea Oculina reef at right does not require sunlight.
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Shallow and Deep-Sea Coral Reefs

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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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Tiny sponge spicules.
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Sparkling Sponge Spicules

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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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But closer to the CO2 seeps, the complex reef has been replaced by a “monoculture” of boulder corals.
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Monoculture of Boulder Corals

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Valentinni's sharpnose puffer lives on Indo-Pacific coral reefs, where it shoals in groups of 10-100 puffers and feeds on algae and tunicates.
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Valentinni's Sharpnose Puffer

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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.
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Coral Reefs: One Species at a Time

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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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dead coral from disease
Article

Sickness in the Sea: A Coral Plague Hits Florida

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