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Great Barrier Reef hit by worst coral die-off on record: scientists

About two-thirds of the shallow-water coral on the reef's northern stretch are dead

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Healthy coral (left) in the Capricorn Group of Islands, a part of the southern Great Barrier Reef, and dead table coral (right) on Zenith Reef, in the northern part of the reef. Scientists surveying the Great Barrier Reef said the coral died after being bathed this year in warm waters that bleached and then weakened it.

Sydney

SCIENTISTS surveying the Great Barrier Reef said on Tuesday that it had suffered the worst coral die-off ever recorded after being bathed this year in warm waters that bleached and then weakened the coral.

About two-thirds of the shallow-water coral on the reef's previously