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Scientists are alarmed by a new video showing severe coral damage on parts of Australia's Great Barrier Reef.

Aerial surveys of the reefs between Cairns and the Torres Strait reveal the worst coral bleaching in 15 years.

Bleaching is triggered by warmer temperatures brought about by the El Niño weather phenomenon.

Scientists explained that when corals are stressed they expel algae causing them to turn white.

-Mornings @ ANC, March 30, 2016