the massachusetts state police chopper spotted this one near where a man was killed last fall scientists say they have never tagged this many this early. i don t even want my toes in the water.rly. i don t even want my toes in the water. reporter: shark attacks are rare, but there s no denying the close encounters in florida more than 60 sharks spotted just off greaten beach in north carolina, a fisherman bitten when he pulled a shark . out of the water he got me reporter: and this massive ancient species bigger than the research sub caught on camera by deep sea scientists. the research sub ca that is amazing reporter: researchers like thomas expect warming sea temperatures to have an even greater impact on shark migration. as the temperature shifts, the prey species that they re chasing so that they come in towards shore in different patterns reporter: back on the beaches there s impact as well there s less people than last year reporter: the fear keeping some aw