Narrator: The Great Barrier Reef is big. So big ... As the name suggests, coral bleaching strips reefs of their color, leaving them completely white. It happens when unnaturally warm ocean ...

The Great Barrier Reef Marine Park Authority ... are causing mass coral bleaching—episodes in which corals lose their color after expelling the one-celled algae that live within their tissues.

"In the Great Barrier Reef, corals set the patterns of life from ... The soft coral’s vivid color likely suggests toxicity to those passersby tempted to nibble at its branches.

Many visitors say the Great Barrier Reef is best seen through a scuba mask, but it's no small feat to traverse the area's dive spots. When choosing which regions to explore, consider your skill ...