Shark Capture, Shark Sightings Prompt Warning

Seaside police are warning beach crowds to watch out for sharks.

Police officers on Sunday drove up and down the beach and used loudspeakers to announce a shark sighting.

Lt. Dave Ham said lifeguards saw a distinctive dorsal fin on Sunday and a lifeguard came across a porpoise Saturday that had been bitten up.

Other apparent shark sightings were made by Coast Guard helicopters in the Lower Columbia River, near Ilwaco, Wash., and off Tillamook, Ore., reported KOIN-TV in Portland.

The beach at Seaside was not closed.

Ham said officials at the Seaside aquarium told him warm waters have moved closer to shore, bringing in seals and porpoises, which attract sharks.

WARNING: Graphic images in video, below: