“All northern hemisphere US-coral reefs are on alert for coral bleaching this year,” said Mark Eakin, coordinator of Coral Reef Watch at Noaa. “If we see bleaching in Florida or Hawaii this year it will be three years in a row.”
Coral in every major reef region has already experienced severe bleaching. About 93% of the reefs on Australia’s Great Barrier Reef have been affected, and almost a quarter of the reef on the 2,300km stretch is now dead.

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