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Coral reef - Wikipedia

en.wikipedia.org/wiki/Coral_reef

Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals. Coral reefs are built by colonies of tiny animals ...

Corals and Coral Reefs | Smithsonian Ocean Portal

ocean.si.edu/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 species depending on reefs for food and ...

Coral Reef | Basic Facts About Coral Reefs | Defenders of Wildlife

www.defenders.org/coral-reef/basic-facts

Coral reefs are some of the most diverse ecosystems in the world, housing tens of thousands of marine species. About one-third of all marine fish species live ...

Coral reefs | WWF

wwf.panda.org/about_our_earth/blue_planet/coasts/coral_reefs/

Coral reefs are home to 25% of all marine life on the planet. In fact the variety of life supported by coral reefs rivals that of the tropical forests of the Amazon or ...

Coral Reefs - National Geographic Video

video.nationalgeographic.com/video/coral-reefs

Coral reefs are the foundation of many marine ecosystems—and they are in danger.

Corals, Coral Pictures, Coral Facts - National Geographic

animals.nationalgeographic.com/animals/invertebrates/coral/

Coral reefs teem with life, covering less than one percent of the ocean floor, but supporting about 25 percent of all marine creatures. However, threats to their ...

What Are Coral Reefs? | Coral Facts - Live Science

www.livescience.com/40276-coral-reefs.html

Oct 8, 2013 ... Coral reefs are large underwater structures composed of the skeletons of coral, which are marine invertebrate animals.

NOAA CoRIS - What are Coral Reefs

www.coris.noaa.gov/about/what_are/

Dec 16, 2014 ... Coral reefs are unique (e.g., the largest structures on earth of biological ... Corals are anthozoans, the largest class of organisms within the ...

NOAA Coral Reef Conservation Program (CRCP) Home Page

coralreef.noaa.gov/

The Coral Reef Conservation Program is a partnership between the NOAA Line Offices that work on coral reef issues. We bring together expertise from across ...

Coral Reefs - Kids Do Ecology

kids.nceas.ucsb.edu/biomes/coralreef.html

LOCATION: Coral reefs are generally found in clear, tropical oceans. Coral reefs form in waters from the surface to about 150 feet (45 meters) deep because ...