Extreme coral bleaching event could spell worst summer on record for Great Barrier Reef

Floods, cyclones, heat stress and predatory starfish contributing to impacts as fourth planet-wide bleaching event confirmed

The Great Barrier Reef is in the midst of what could be its worst summer on record with a widespread and extreme coral bleaching event coming on top of floods, two cyclones and outbreaks of coral-eating starfish, according to an official Australian government report.

The summer snapshot" report released by the Great Barrier Reef Marine Park Authority and the Australian Institute of Marine Science said: Compared [with] previous summers, cumulative impacts have been much higher this summer and a widespread bleaching event is still unfolding."