Margaret Bowles and Maddie Cronin were paddleboarding and taking photos off of Stoney Beach on the Fourth of July when Bowles noticed an alarming dorsal fin. It's the first confirmed sighting of a great white shark off of Woods Hole in more than 20 years.

Two Cape Cod paddleboarders are still processing a Fourth of July scare on the water off Woods Hole. Margaret Bowles and Maddie Cronin were roughly 100 yards off shore near Stoney Beach in Falmouth Friday before sunset. They decided to bring their phones out to take pictures. Bowles said she saw something pop up next to Maddie’s board.

As Cronin, 18, snapped photos of Bowles, 19, around 7:30 p.m., a great white shark moved through the water nearby, its dorsal fin slicing through the surface.