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www.ask.com/science/coral-reefs-endangered-43d1a544f834074f

Coral reefs are endangered due to rising global temperatures, pollution and overfishing. It is estimated that about 1/5 of all coral reefs on the planet have been destroyed. The re...

Coral reefs are underwater structures formed from the calcium carbonate secreted by corals.

Coral reef

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 ...

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 origin) and ... Stony corals (scleractinians) make up the largest order of ...

marinelife.about.com/od/conservation/f/coralbleaching.htm
Coral bleaching happens when coral polyps, the animals that build corals, shed the algae (zooxanthellae) that give them their color, and which are necessary for their survival. Corals in the Caribbean and Florida have bleached when sea surface temperatures rose and wer... More »
By Jennifer Kennedy, About.com Guide

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 ...

What Are Coral Reefs? | Coral Facts - LiveScience

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.

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 - 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 ...

Corals, Coral Pictures, Coral Facts - National Geographic

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

Coral organisms, called polyps, can live on their own, but are primarily associated with the spectacularly diverse limestone communities, or reefs, they construct.

Popular Q&A
Q: What is a coral reef?
A: a place in the water that is VERY large Read More »
Source: wiki.answers.com
Q: What is a coral reef?
A: Coral reef (n) a reef consisting of coral consolidated into limestone. Thanks for asking Read More »
Source: www.chacha.com
Q: What is a coral reef.
A: a place that is home to more species of fishes and invertebrates than any other enviorment on earth. Read More »
Source: www.answers.com
Q: What is a coral reef?
A: For brief easy to read facts try. http://www.kidscantravel.com/familyvacat…. and. http://animals.nationalgeographic.com/an…. For lots of pictures. http://images... Read More »
Source: answers.yahoo.com
Q: What is a coral reef?
A: Coral are cnidarians that live in stone-like structures that they make themselves. While they're alive, the structure is actually flexible (when people say "cor... Read More »
Source: answers.yahoo.com