More Corals

The People's Reef, a part of the Hyperbolic Crochet Coral Reef , from above. The HCCR was created by Margaret and Christine Wertheim of the Institute For Figuring and is on exhibit at Smithsonian's...
The branches of a primnoid coral in the genus Calyptrophora provide a habitat for galathaoid crabs. Learn more about the deep-sea coral reefs in our Deep-sea Corals article .
On March 1, 1954, the United States military tested nuclear bombs in the ocean around Bikini Atoll in the Pacific Ocean to see what kind of damage they would do to ships. The largest explosion was...
Scientists don’t often get the opportunity to travel through time. But nestled among the beautiful coral reefs of Papua New Guinea (PNG) is a place that provides a glimpse today of what could be the...
Close to the volcanic CO 2 seeps, the vast diversity of corals that exists in less-acidic waters is replaced by a "monoculture" of boulder corals. These are less fragile and better suited to life in...
Ocean scientists discovered this 1.5-m (5-ft) tall yellow bamboo coral in 2007 off the coast of Hawaii in 1,459 m (4,787 ft) of water. It is thought to represent a new genus. Learn about more deep-...
In this close-up photo, you can actually see the photosynthetic algae, or zooxanthellae, living inside a tiny coral polyp. Look for the brownish-green specks in the colorless polyp. Corals depend on...
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...
Sea stars are important members of marine ecosystems, especially in the tropics. We may think of tropical coral reefs as being home mainly to fish and corals, but in fact these habitats are home to a...
This map shows where some of the most significant species of deep-sea corals are located. Learn more about the distribution and ecology of deep ocean corals in the article " Coral Gardens of the Deep...
Visitors to the Hyperbolic Crochet Coral Reef temporary exhibit at Smithsonian’s National Museum of Natural History saw both the main installation created by to the Institute For Figuring and the...
Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one quarter of all ocean species depending on reefs for food and shelter. This is a remarkable statistic...
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