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Experts fear species decline after huge number of deaths on Henderson and Cocos. More than half a million hermit crabs have been killed after becoming trapped in plastic debris on two remote island groups, prompting concern that the deaths could be part of a global species decline. The pioneering study found that 508,000 crabs died on the Cocos (Keeling) Islands archipelago in the Indian Ocean, along with 61,000 on Henderson Island in the South Pacific. Previous studies have found high levels of plastic pollution at both sites.
