http://ocean.si.edu/ocean-life/invertebrates/corals-and-coral-reefs

Apr 30, 2018 ... Coral reefs are the most diverse of all marine ecosystems. They teem with life, with perhaps one-quarter of all ocean species depending on ...

https://www.epa.gov/coral-reefs/basic-information-about-coral-reefs

May 4, 2018 ... Coral reef ecosystems are intricate and diverse collections of species that interact with each other ... Not all corals on the reef are stony corals.

https://www.barrierreef.org/latest/reefinsider/january-2017/9-fun-facts-about-coral-reefs

A coral reef isn't one 'thing', it's actually a community of life that lives and ... filter that traps things floating in the water, which makes for cleaner water all around.

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

Sep 24, 2018 ... Coral reefs are large underwater structures composed of the skeletons of coral, which are marine invertebrate animals. Corals are found all ...

https://reefci.com/2017/08/11/5-amazing-facts-about-coral-reefs/

Aug 11, 2017 ... Known as “rainforests of the sea,” coral reefs cover less than 1% of the ocean but are home to almost 25% of all known marine species! Corals ...

https://www.mnn.com/earth-matters/animals/blogs/5-fascinating-facts-about-coral-reefs

Oct 26, 2017 ... Once you dive into the facts, you realize that coral reefs are one of the most amazing wonders of the world.

https://www.zegrahm.com/Fascinating-Facts-About-Cora-Reefs

Mar 2, 2018 ... So instead, here are 25 fascinating facts about coral reefs that you might not know, from general info and the benefits of coral reef systems to a ...

https://www.nationalgeographic.com/animals/invertebrates/group/corals/

Meet the tiny organisms that combine to create the world's great tropical reefs. Find out about the threats that imperil corals worldwide.

https://www.noaa.gov/education/resource-collections/marine-life-education-resources/coral-reef-ecosystems

Coral reefs are some of the most diverse ecosystems in the world. Coral polyps, the animals primarily responsible for building reefs, can take many forms: large ...

https://en.wikipedia.org/wiki/Coral_reef

A coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are ..... Coral reefs support over one-quarter of all marine species.