The 16 foot 3,500lbs great white named Mary Lee by researchers was swimming about 200 yards off Jacksonville Beach.
Scientists tagged the shark back in September and have been tracking her with special GPS equipment.
She has been staying between 10 to 20 miles off the coast the last month, but Tuesday’s encounter was a little too close for comfort.
Scientist, Chris Fisher said, “The chances of encountering this one individual shark on a whole stretch of coastline are pretty minimal. But again there is that possibility.”