Also riptides will pull you out, small venomous fish will crawl up your urinary tract, volcanic gases will take away buoyancy from the water so you will sink (plus the poisonous gas will kill you). Oh, and the sun will give you cancer. That is, if you don’t get bitten by a spider or snake in your hotel room before you even get to the waterline.
Btw did I mention that basically the entire population is descended from criminals who were sent there as punishment?