PHOTOS: Giant Rays' "Feeding Frenzy" Spots Protected

PHOTOS: Giant Rays'
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Fish swim over coral in the Maldives' Baa Atoll, a ring-shaped coral island that encircles a shallow lagoon.

Often located in the middle of vast tropical oceans, atolls are coral reefs that extend above the water.

Over thousands of years tiny, sea anemone-like coral polyps can build atolls as wide as six miles (ten kilometers), some of which can small cities, according to NASA's Earth Observatory.
—Photograph courtesy Thomas P. Peschak, Save Our Seas Foundation
 
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