Great Barrier Reef
From cyclones to predatory starfish, various factors are wreaking havoc on the world's largest reef.
The world's largest reef is on a steep decline, vanishing in front of researchers' eyes.
New underwater views of the Great Barrier Reef debut as activists fight to save it from a neighboring mega-mine.
The coral diversity in the West Indian Ocean, especially around Madagascar, is greater than previously believed, new research shows.
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