Beachgoers were told to get out of the water after a shark was spotted off the coast of Biddeford Thursday.

News Center Maine reports that a lifeguard spotted a shark fin in the water around 1 p.m. at Middle Beach.

The lifeguard blew his whistle, the red flag was raised, and everyone was told to return to shore as a precautionary measure.

Beachgoers were given all clear to go back in the water an hour later.

According to the Bangor Daily News, the shark sighting came a week after fishermen caught a great white off the coast of Cape Elizabeth.