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Great Barrier Reef. the world's largest coral reef system composed of over 2,900 individual reefs and 900 islands stretching for over 2,600 kilometers. Ecology. Environmental threats. Crown-of-thorns starfish – one of the biggest threats to the Great Barrier Reef. Tourism.
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the world's largest coral reef system • composed of over 2,900 individual reefs and 900 islands • stretching for over 2,600 kilometers
Environmental threats Crown-of-thorns starfish – one of the biggest threats to the Great Barrier Reef
Tourism A Great Barrier Reef ferry A scuba diver looking at a giant clam on the Great Barrier Reef