Maui County said Friday the man was snorkeling with another man about 200 yards off Kihei when the shark attacked.
The Oregonian identified the man as Thomas Floyd Kennedy of the Portland suburb of Lake Oswego.
The county says the man suffered multiple cuts on his lower left leg and thigh.
He told authorities the shark’s head was about two feet wide, but it’s not known what type of shark attacked him.
Kennedy told Hawaii TV stations he could see he was trailing blood. He says he kept watching behind because he was concerned the shark would come back.
Paramedics took him to Maui Memorial Medical Center.
Lifeguards closed part of the beach to swimmers.
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