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Last September, the Citizens of the Sea blog series brought you a story of doom and gloom from the reefs of Bocas del Toro, Panama. That is the time of year we typically study...
Ultraviolet light illuminates the growth rings in a cross-section of a 44-year-...
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Sample the surprising diversity of deep-sea corals. See some of the ways they...
Bikini Atoll, formed over millions of years around an island in the Pacific...

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Blast fishing, when dynamite or other explosives are used to stun or kill fish, is a practice used in many villages and isolated regions of the world. Hundreds of fish can be seen strewn across the reef, left as bycatch, such as...
How does a coral spend its day? Most of us would say: not doing much. To the...
Sponges are animals that eat tiny food particles as they pump water through...

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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 Ocean Blog

We have arrived as the advanced scouting party to the scene of this year's field work location: Pemuteran, a small fishing village in northwest Bali. More importantly, we are sitting squarely at the...
This 200-year-old bamboo coral colony is growing on the Davidson Seamount off the coast of California. The skeleton of this deep-sea coral has bamboo-like segments. See more pictures of coral in our...
The pearly razorfish’s name may be slightly misleading since it is neither as rare as a pearl nor as dangerous as a razor. It is a common fish that tends to live in clear shallow areas near seagrass...
Species of deep-sea gold coral, or Gerardia , often have a tree-like shape, as you can see in this specimen. See more pictures of coral in our Deep-sea Corals article.
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...
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...
A scuba diver explores elkhorn corals ( Acropora palmata ) growing on a tropical reef. Coral reefs provide recreation and inspiration for millions of people every year. Elkhorn coral is listed as...
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...
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...
Branching corals, because of their more fragile structure, struggle to survive in acidified waters that surround the volcanic CO 2 seeps of Papua New Guinea. Read more about how reef scientist...
Nestled among the beautiful coral reefs of Papua New Guinea (PNG) is a place that could provide the key to our understanding of one of the biggest threats to coral reef survival: Ocean Acidification...
Half a century after nuclear testing blasted the reefs of Bikini Atoll, corals have recovered.
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...
Papahānaumokuākea, a chain of islands northwest of the main Hawaiian archipelago, is home to vibrant coral reefs with scores of fish species. It was designated a Marine World Heritage Site in August...
Nine years ago I was invited by a colleague to join a research team investigating deep-sea coral habitats . I was asked to examine the invertebrates associated with these ecosystems. After my first...
Blast fishing, when dynamite or other explosives are used to stun or kill fish, is a practice used in many villages and isolated regions of the world. Hundreds of fish can be seen strewn across the...
Several species of deep-sea corals form a garden 165 m (540 ft) below the ocean’s surface off the coast of Alaska’s Aleutian Islands. Explore more in the multimedia feature " Coral Gardens of the...
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