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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.

How Reefs Are Made | Coral Reef Alliance

coral.org/coral-reefs-101/coral-reef-ecology/how-reefs-are-made/

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.

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.

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

www.teachoceanscience.net/teaching_resources/education_modules/coral_reefs_and_climate_change/what_is_a_coral/

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 ...

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 ...

What are corals? | International Coral Reef Initiative

www.icriforum.org/about-coral-reefs/what-are-corals

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 ...

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 ...

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." ...

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 ...