Coral Reefs

LATEST TODAY'S CATCH

A School of Hawaiian Squirrelfish

Apr 10, 2013 - 9:03AMCheck out the eyes on these Hawaiian squirrelfish (Sargocentron xantherythrum)! Because squirrelfish are almost entirely nocturnal, they need big eyes to absorb as much moonlight and starlight as they can in the dark. During the...
Mar 26, 2013 - 9:40AM
Tectitethya crypta (formerly known as Cryptotheca crypta) is a large,...
Mar 15, 2013 - 9:07AM
Corals are sedentery animals, so how do they reproduce? One way is sexually...

SPOTLIGHT

Corals and Coral Reefs

Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one quarter of all ocean...
Jun 7 2011 - 10:38am
Ocean scientists recently discovered this new species of black coral off the coast of southern California.
Jan 26 2010 - 11:45am
Dr. Stephen Cairns is a research zoologist and chair of the Department of Invertebrate Zoology at the Smithsonian’s National Museum of Natural History. His research focuses on the diversity, distribution, and evolution of deep-water corals—both fossil and living. Learn all about deep sea corals in...
Jul 27 2011 - 11:25am
Deep-sea coral beds are true biodiversity hotspots. It’s urgent that we study these extreme environments because we know so little about them, because they are important communities for so many deep-sea creatures, and because they are so susceptible to human activities.
Jun 7 2011 - 12:29pm
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 colors. It’s the skeleton that is black. See more pictures of coral in our Deep-sea Corals article.
Jan 26 2010 - 11:45am
Corals, sponges, and algae are the major components of most coral reef communities. To the untrained eye, they are sometimes difficult to tell apart. More about coral reef ecosystems can be found in the Coral Reefs section.
Aug 2 2012 - 3:11pm
Branching corals, because of their more fragile structure, struggle to live in acidified waters that surround the volcanic CO2 seeps of Papua New Guinea. Read more about how reef scientist Laetitia Plaisance uses carbon dioxide seepsocean acidification and how it will affect biodiversity on coral...
Jan 26 2010 - 11:45am
Coral reefs provide food for swarms of fish, both large and small. More about coral reef ecosystems can be found on our Coral Reefs overview page.
Dec 7 2009 - 1:48pm
Algae has overtaken this coral reef off heavily populated Kiritimati, or Christmas Island. Few fish swim in the murky waters. The causes include pollution, overfishing, and increased water temperature. More about coral reef ecosystems can be found in our Coral Reefs featured story.
Jan 26 2010 - 11:45am
On Moorea, an island in French Polynesia, researchers are striving to complete a biocode—a DNA catalog of every life form big enough to pick up with tweezers.
Aleutian Islands Deep-Sea Corals
Aug 12 2011 - 2:04pm
In this brief video clip from NOAA, catch a glimpse of the startling beauty and diversity of life found among deep-sea corals near the Aleutian Islands in Alaska. Explore more in the multimedia feature "Coral Gardens of the Deep Sea."  
Sep 28 2012 - 10:35am
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 one of the many marine ecosystems protected in the 140,000 square miles of...
Jun 7 2011 - 12:24pm
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.
Jul 27 2011 - 10:46am
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.
Ten Things You Never Knew About Seahorses
Jan 2 2013 - 1:01pm
  By Lindsay Aylesworth, Project Seahorse
Jan 26 2010 - 11:45am
This coral reef in the Western Pacific Ocean was killed by human input of silt and sand from nearby islands reaching the coral reef habitat. More about coral reef ecosystems can be found in our Coral Reefs featured story.
Jan 26 2010 - 11:45am
Compare the healthy coral on the left with the bleached coral on the right. Increased water temperatures caused the bleached coral to lose the microscopic algae that give the coral color and provide it with food. More about coral reef ecosystems can be found in the Coral Reefs section.