Topic - Greg Skomal

Skomal said the biggest threat contributing to the decline of the shark population now is commercial fishing, which exploded in the late 1970s and is today driven by high demand for fins and meat used in food dishes, as well as the use of skin to make leather and oil and cartilage for cosmetics.

Endurance swimmer attempting first-ever swim around Martha's Vineyard ahead of 'Jaws' anniversary →

There are currently no licensing or registration requirements for the tours, but those and other regulations should be considered if more join the fray, he said.

Shark tourism grows on Cape Cod, 3 years after attacks →