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If you look closely, you can read a message in the corals. We are not being metaphorical. Barry and Aimee Brown set out to search for hidden letters among brain coral colonies two years...
The majestic and highly predatory red lionfish ( Pterois volitans ) , native to...
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Reef biologists over a certain age are haunted by memories of what glorious...
by Laura Brodbeck A special type of marine protected area (MPA) called a “no-...

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It's a pygmy seahorse ( Hippocampus bargibanti ), found in Indonesia's biodiverse Coral Triangle and one of the smallest seahorse species in the world! They can change colors like a chameleon to blend into their environment. This...
In this photo of a shallow coral reef in the Pacific there are three species...
"Macro shot of a whip coral goby, taken in Fiji during a trip to the...

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It may be the last place you’d expect to find corals—up to 6,000 m (20,000 ft) below the ocean’s surface, where the water is...
Dr. Amy Baco-Taylor observed corals like these on her first submarine dive to a deep-sea coral bed off the coast of Hawaii. They include primnoids, zoanthids, and Gerardia . The high density and...
Coral reefs are beautiful, vibrant ecosystems that house roughly one quarter of all marine species and provide billions of dollars in products and services to humans each year. But they are also...
Coral reefs are bustling cities of marine life, until rising ocean temperatures turn them into ghost towns. Can reefs spring back from devastating bleaching events? In this episode of the Podcast of...
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...
The small larvae of elkhorn coral ( Acropora palmata ) settle and grow on the crustose coralline algae species Hydrolithon boergesenii .
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...
Red coral necklaces fill a store display window. The United States annually imports around one million live coral animals from tropical reefs for use in aquariums, and is the largest documented...
Dr. Claude Payri, a researcher working on the Moorea Biocode Project , collects samples on the reef slope of Moorea, French Polynesia. More about the Island of Moorea can be found in our Scientists...
When we think "Africa," we think of the "Big Five"—lions, elephants, leopards, buffalo and rhinos—that crisscross the African Savannah. Few would imagine that there could be more natural beauty on...
This bluefin trevally is lucky to call Hawaii’s Maro Coral Reef, part of the Papahānaumokuākea Marine National Monument , its home. Maro is the largest reef in the Northwest Hawaiian Islands and just...
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.
Much of the carbon dioxide we emit into the atmosphere ends up in the ocean. As CO 2 levels rise, seawater becomes more acidic. This change in chemistry poses a serious threat to marine organisms...
Coral reefs are beautiful, vibrant ecosystems that house roughly one quarter of all marine species and provide billions of dollars in products and services to humans each year. But they are also...
The robotic arm of a Pisces submersible collects a gold coral colony ( Gerardia sp.) during a research cruise in the Hawaiian Islands. Ocean scientists have radiocarbon-dated some Gerardia specimens...
Dr. Valerie Paul is studying chemical defenses that may protect coral reefs from many species of herbivores that live on coral reefs. In this picture she is examining tropical seaweeds on...
Dr. Amy Baco-Taylor dives to deep-sea environments to study corals and the invertebrates that live in them. Learn how she became interested in deep-sea corals , and explore more in the multimedia...
The Ujung Kulon National Park in Indonesia was inscribed on the World Heritage List in 1991. The park, located in the extreme western tip of Java on the Sunda shelf, includes the Ujung Kulon...
In this photo of a shallow coral reef in the Pacific there are three species of forams . On the left, Peneroplis planatus . In the center, Amphistegina lessonii . And on the right, Laevipeneroplis sp...
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