A Portland man was bitten by a shark on the Oregon Coast Monday afternoon, police said.

The attack occurred at Indian Beach at Ecola State Park, north of Cannon Beach.

The victim, 29-year-old Joseph Tanner, was surfing when the shark bit his upper and lower thigh.

Tanner told responders that the shark was "medium-big" and he thought it might have been a great white shark but he wasn't sure.

Tanner was airlifted to Legacy Emanuel hospital in Portland with serious injuries, police said.

There are 16 species of shark found along the Oregon Coast, including great white sharks. There have been 27 shark attacks in Oregon since 1974. No one died.