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