A 16ft great white shark is about 21 miles from the Island and moving in.The 3,456lb shark Mary Lee, was caught and tagged by Ocearch last September off the coast of Cape Cod.Since then, the mature female has moved up and down the US East Coast, swimming as far south as Florida before returning to the waters off New England.Ocearch founding chairman Chris Fischer named the shark after his mother.She has made headlines across the US, most notably in Jacksonville, Florida. In January she swam into the surf break off the beach there without incident.Earlier this month trackers put her on a course towards Bermuda.According to Ocearch’s online global shark tracker, Mary Lee surfaced around 21 miles to the Island’s North East yesterday morningGreat white sharks have a fearsome reputation as maneaters but typically feed on marine mammals, turtles, other fish and sea birds rather than people.Useful website: sharks-ocearch.verite.com/