This beach season, every week is Shark Week. Professional shark taggers warn there are at least four great whites lurking off Long Island and New Jersey en route to Cape Cod – with a 600-pounder named Rose and a monster 16-foot, 3,456-pounder called Mary Lee right behind them. “Right now the sharks are loading up on dog fish, seals and blubber over the summer,” said Chris Fischer, the founder of the Ocearch research foundation. Osearch has tagged 70 sharks, but they represent a tiny portion of the maneaters out there. “There are thousands of them on the East Coast right...