Snakes can bite you underwater, but usually only if they're provoked or if they feel threatened.
If you're interested in swimming where you know snakes have been seen, you probably want to know all you can. Snakes can bite you underwater, but usually only if they're provoked or if they feel threatened. In the Tropical Journal of Medicine and Hygiene, researchers studied 100 sea-snake bite patients who visited a local hospital. They found that over 80% of patients were fishermen who had been in the water.
Since bites were on their lower limbs, researchers concluded that they were bitten after stepping on a snake in the water. Regardless of whether the snake is venomous, it can still bite. As recommended by the University of Florida Department of Wildlife Ecology and Conservation, always leave snakes alone if you come across one in the water or on land.