A Duxbury shark sighting has beachgoers on high alert after a "swim at your own risk" warning was issued Tuesday.
The warning came a day after a Great White shark was spotted 150 yards off the coast of a Duxbury beach, prompting a temporary two-hour swimming ban and a sand-drawn reference to the legendary shark thriller "Jaws" ["You're gonna need a bigger boat."].
The harbor master reports that as a result of the sighting, which happened around 2 p.m. Monday when a police helicopter spotted the 15-foot shark, Duxbury officials increased police and harbormaster patrols on the beach and in the water.
"We are advising that if beach patrons wish to swim, they may do so at their own risk with the understanding that if they choose to enter the water, they should do so cautiously and avoid going into the water beyond waist depth," the harbormaster said in a press release issued Tuesday morning.