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...
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.
May 10 2012 - 12:43pm
“This moray eel was resting among some hard coral and was mesmerized by my dive lights, making it a very cooperative subject. The moray eel rhythmically opens and closes its mouth to move water through its gills and facilitate respiration, giving it the appearance of being aggressive and making for...
Oct 2 2012 - 3:04pm
This colorful coral lives in Australia's Great Barrier Reef. On the whole, this coral reef is the largest single structure built by living organisms and can be seen from space! Although more than one-third of the reef is protected from fishing and other human impacts, it is still 50% smaller than...
Jun 7 2011 - 9:10am
Unlike the shallow tropical coral reef pictured on the top, the deep-sea Oculina reef at bottom does not require sunlight. Learn more in the article "Coral Gardens of the Deep Sea."
Jun 7 2011 - 12:32pm
This bubblegum coral (Paragorgia arborea) has a fanlike shape. It is growing 1,310 m (4,298 ft) deep on the Davidson Seamount southwest of Monterey, California. Learn more about deep-sea corals in the multimedia feature "Coral Gardens of the Deep Sea."
Caribbean boulder star coral (Montastrea cavernosa)
Sep 10 2010 - 3:03pm
Each month, the Naked Oceans podcast invites a leading marine researcher to pick the "critter of the month" by asking: if you were a marine organism, which one would you be? This month, Dr. Nancy Knowlton, the Sant Chair for Marine Science at NMNH makes her pick: the Caribbean boulder star coral (...
Jul 27 2011 - 9:21am
This colony of Lophelia pertusa was photographed from the Mingulay Reef Complex off Scotland in 2005. Learn more about the deep-sea coral reefs in our Deep-sea Corals article.
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...
Oct 23 2012 - 11:54am
A coral reef near Bocas del Toro, Panama recovers from a mass bleaching event that occurred in the summer of 2010. The tops contain some bleaching, but the sides look healthy. Smithsonian marine biologist Dr.
Jun 7 2011 - 1:18pm
See a few of the many species of deep-sea corals that have been discovered by scientists just since 2004. Learn about more deep-sea discoveries in our Deep-sea Corals article.
Jul 27 2011 - 11:50am
Dr. Martha Nizinski holds a specimen of a fan sponge (Phakellia sp.) collected at a deep-sea coral study site off the coast of South Carolina. Deep-sea corals and sponges provide structure for a variety of other organisms, which use these habitats for protection as well as for finding food and...
Jul 27 2011 - 12:15pm
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.
Jul 27 2011 - 12:30pm
I still haven’t gotten beyond the ‘gee whiz’ factor of studying communities of animals in deep-sea coral habitats. Climbing over undersea mountains and along the steep cliffs of submarine canyons using subs and ROVs, I’ve had the opportunity to see some species of deep-sea fishes alive for the very...
Jul 27 2011 - 11:09am
This close-up photograph of gold coral (Gerardia sp.) was taken at the Cross Seamount in the Pacific Ocean at a depth of 400 m (1,312 ft).
Aug 13 2010 - 4:27pm
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 2010.
Jan 26 2010 - 11:46am
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–called zooxanthellae (zo-zan-THELL-ee). This cutaway diagram of a coral polyp shows where the...