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Stare at a tide pool and you will often see a crust of pink coating the bottom. No, this is not bubblegum from some careless teenager’s shoe: it’s a stony kind of seaweed that,...
Coral reefs are bustling cities of marine life, until rising ocean temperatures...
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When snorkeling in the Kahekili Herbivore Fisheries Management Area (KHFMA) in...
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By Lindsay Aylesworth, Project Seahorse The day I stepped into my wetsuit,...

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Is it lights out for corals once they have experienced a bleaching event? Not necessarily. This photo shows a coral reef near Bocas del Toro, Panama that is in the process of recovering from a mass bleaching event that occurred...
Staghorn (seen here) and elkhorn corals are listed as Threatened under the...
A coral ( Montastraea faveolata ) has just spawned. Each of the hundreds of...

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Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one quarter of all ocean...
The Oculina deep-sea coral reef at top has not been disturbed by humans—but trawling has devastated the one at bottom. When fishermen trawl, they drag a net along the seafloor, destroying everything...
A sea lion in the Sea of Cortez observes Dr. Peter Auster as he observes reef fishes. Learn more about deep-sea coral reefs in our Deep-sea Corals article.
When snorkeling in the Kahekili Herbivore Fisheries Management Area (KHFMA) in West Maui, I keep an eye out for certain kinds of fish. Not the brightest or the biggest, but those herbivores such as...
Black corals, like this one growing on the Manning Seamount off the New England coast, often resemble bushes or trees. Contrary to its name, the living tissue of black coral can be one of several...
What are corals? Corals themselves are animals. But tropical reef-building corals have tiny plant-like organisms living in their tissue. The corals couldn’t survive without these microscopic algae–...
In the wet lab aboard the R/V Seward Johnson , Dr. 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...
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