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Starfish eating Australia's Great Barrier Reef

A major outbreak of coral-eating crown of thorns starfish has been found munching Australia's world heritage-listed Great Barrier Reef, scientists said, prompting the government to begin culling the spiky marine animals.

The predator starfish feeds on corals by spreading its stomach over them and using digestive enzymes to liquefy tissue, and the outbreak hits as the reef is still reeling from two consecutive years of major coral bleaching.

The crown of thorns were found in plague proportions last month in the Swains Reefs, at the southern edge of the Great Barrier Reef, by researchers from the reef's Marine Park Authority.