FECKIN SHARKS , its if you were attacked on land, by man or beast you could fight back , with feet+fists or pick some thing up. But in the water, a shark can hit from any Angle, and you carnt see it most of the time. I am not a bad swimmer, went south Italy last year, went in the sea with the wife a couple of times, went out about 1/2 mile, but never really felt relaxed