Shark devours seal off coast of popular holiday destination in gruesome video

Shocking footage captured a shark feasting on a seal just feet from a Nantucket beach on Sunday, turning the waters red with blood and prompting officials to ban swimming for the rest of the afternoon.

Video of the alarming attack, obtained by the Nantucket Current, shows fins flailing violently in the water just off the shore of Great Point Beach.

A shark’s dorsal fin then surfaces in a pool of blood, and the seal’s carcass floats gloomily for a fleeting moment before the shark bites it again.

“Oh my God, that shark just ate that seal,” the woman filming, Sandy Fink, exclaimed in the clip.

Fink, an Orlando resident who was vacationing on the Massachusetts island with her boyfriend, said she was enjoying a day at the beach when she spotted the shark.

“I was fishing off the shore and I was filming the seals and I thought, ‘Is that blood? Wait! That’s a shark and it’s eating the seal,’” Fink told The Current.

Her boyfriend, Ron Welter, was about to take a dip when she stopped him.

“So I ran over to show Ron the video and he said, ‘I was just about to go in real quick to cool off,’ and I said, ‘No!’”

The attack, which occurred too close for comfort, was just one of several shark-on-seal killings reported along the island’s east coast on Sunday, Diane Lang of Trustees of Reserves told the local outlet.

The trustees, who own and operate the Coskata-Coatue Wildlife Refuge, which includes Great Point Beach, banned swimming for the rest of the afternoon after the reports.

The organization also closed the beach to swimmers last year after numerous shark sightings.

The seal population around Nantucket has increased in recent years, making shark sightings increasingly common during the summer when predators help themselves to the buffet, according to Current.