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The Most Beautiful Coral Reefs (PHOTOS)

06/23/2010 05:12 am ET | Updated May 25, 2011

Coral reefs are the rainforests of our oceans, providing a home for 25% of all marine life. Coral polyps create calcium carbonate to build the reefs as their shelter, preferring sunny, shallow, and clear water.

A recent ship accident, spilling oil in the Great Barrier Reef, is a reminder of just one of the many threats we pose to these delicate and vital ecosystems.

Have a look at the world's most beautiful coral reefs, and vote for your favorite!

Most Beautiful Coral Reefs
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