http://www.iflscience.com/plants-and-animals/great-barrier-reef-half-dead-93-percent-bleached

The news keeps getting worse for the the world’s greatest coral reef system. Fresh on the heels of news that most of the Great Barrier Reef (GBR) has bleached comes the announcement that more than half of the coral in the reef has died this summer. Prospects look grim for most of the rest.
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The extent of the damage varies with how far, and how long, temperatures exceeded normal maxima. “Inshore reefs where water has ponded have higher mortalities,” Hoegh-Guldberg said. “Where there are more currents, temperatures have been lower, but even a lot of the outer edge reefs have been very affected.”