There’s been an increase in Hammerhead shark sightings off Cape Cod. John Chisolm, adjunct scientist at the New England Aquarium, has studied shark data for over forty years, and says they’ve always visited here. Cape Cod is part of Hammerheads regular commute alongside the Gulf of Maine and Canadian waters.

Chatham: On Friday, a white shark was spotted about 30 feet off North Beach Island, traveling south. The next morning, an acoustic receiver detected an 11-foot shark that researchers named "Baobab" in the area. Also on Saturday, a user reported that a shark was seen about 200 feet off North Beach Island and was headed south.

Tiger sharks are very rare in New England, but a local marine biologist says they’re slowly growing more common.