There are loads of shark attacks everywhere. I would be too scared to swim in the open sea, more than about 20 feet out- its scary anyway. I was on hol years back and saw someone swimming must have been half a mile out in Majorca or somewhere and they were doing an evening swim. You could just see their head.. If they had leg cramps come on, it would be game over. Looking at the Jaws pics, reminds me , on you tube fairly recently, I came across an Italian Rip Off Version of Jaws- they made a direct copy of the film. How they did not get sued I don't know,
Presume the film makers didn't care about legal issues- I think it was a very similar plot.
Robert Shaw in that film talking about the true WW2 story of the US Navy crew being picked off one by on by sharks. People pay to go on shark experiences and "pet" the sharks, its been reported that's why many attacks occur.