The World’s Largest (and Most Magnificent) Coral Reefs

Covering only about 1 percent of the ocean floor, reefs are a home for about 25 percent of the world's marine species.

Geography The World's Largest (and Most Magnificent) Coral Reefs Each of these individual animals is also covered by a hard exoskeleton, which makes coral reefs appear very strong and rock-like. Covering only about 1 percent of the ocean floor, reefs are a home for about 25 percent of the world's marine species. READ NOW Advertisement READ THESE The 25 Biggest Creatures on the Planet What Causes the Ocean's Dead Zones? The Reason Similar Animals Become Different Over Time You are receiving this newsletter because you subscribed to the Today I Learned newsletter. If you wish to unsubscribe, please click here A Dotdash Brand 1500 Broadway, 6th Floor, New York, NY, 10036 © 2018 Dotdash - All rights reserved. Privacy Policy.