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Coral reef

en.wikipedia.org/wiki/Coral_reef

Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures .... As the name implies, the bulk of coral reefs is made up of coral skeletons from mostly intact coral c...

What is a coral reef made of? - NOAA's National Ocean Service

oceanservice.noaa.gov/facts/coralmadeof.html

A coral reef is made of thin layers of calcium carbonate.

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 ... No Apologies Made, These 20 Women Are Filthy Rich!

How are coral reefs made? | Reference.com

www.reference.com/science/coral-reefs-made-c4731a8b4e927932

According to the National Oceanic and Atmospheric Administration, coral reefs are formed when coral larvae attach themselves to rocks or other hard surfaces ...

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 ...

Frequently Asked Questions - Coral Reef Adventure

www.coralfilm.com/faq.html

What Is The Difference Between Hard And Soft Corals? ... Hard corals, also called reef-building corals, produce a rock-like skeleton made of the same material ...

www.ask.com/youtube?q=What Are Coral Reefs Made Of&v=eIul2ObvKV8
Jul 6, 2014 ... Coral reefs in the Caribbean are slowly dying! ... "Coral reefs are underwater structures made from calcium carbonate secreted by corals." ...

How Are Coral Reefs Formed? - Coral Reef Facts

www.coral-reef-info.com/coral-reef-formation.html

Coral reef formation involves a variety of processes operating at different spatial scales, and our discussion of how coral reefs are formed reflects that reality.

How Do Coral Reefs Form? - Animals & Wildlife - About.com

animals.about.com/od/coralreefs/f/coralreefform.htm

Coral reefs often resemble rock formations or even plants but such resemblances are only superficial. Coral reefs are in fact made up of many tiny animals ...

Corals and Coral Reefs | Smithsonian Ocean Portal

ocean.si.edu/corals-and-coral-reefs

In the so-called true stony corals, which compose most tropical reefs, each polyp sits in a cup made of calcium carbonate. Stony corals are the most important ...

Answer
Coral reefs are underwater structures formed from the calcium carbonate secreted by corals.
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How Reefs Are Made | Coral Reef Alliance

coral.org

Reefs are built by coral polyps as they secrete layers of calcium carbonate. The corals that build reefs are known as “hard” or “reef-building” corals.

Coral Reefs and Climate Change - What is a coral - Teach Ocean ...

www.teachoceanscience.net

It is made out of the same substance that shellfish use to make their shells–– calcium carbonate. coral heads and coral reefs. Corals can grow into structures as ...

What are corals? | International Coral Reef Initiative

www.icriforum.org

Corals are invertebrate animals belonging to a large group of colourful and fascinating animals called Cnidaria. Other animals in this group that you may have ...