Two kayakers helped the person ashore and an ambulance provided further assistance, but she was pronounced dead at the scene, Marine Patrol said.
The woman’s name was not available on Monday.
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There has been only one unprovoked shark attack recorded in Maine, New England shark expert James Sulikowski told the Portland Press Herald. Sulikowski, who does research for Arizona State University, said it was possible the shark mistook the person for food.
The State Marine Patrol urges swimmers and boaters to exercise caution around Bailey Island and avoid swimming near schools of fish or seals.
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