What happens if you drink to much water?
You will need to go to the loo
Okay, here's what I know. If you drink WAY too much water, you can get water intoxication. This mostly happens to athletes, and young infants. Infants might drink many bottles of water, and athletes might drink too much since, of course, they sweat a lot. So, you can sort of "drown", but only technically.
There are animals that can get so much of their water from the food that they eat that they very rarely have to drink. But these still tend to drink a little if water is available. There are no animals that routinely die from drinking pure water. Animals that die of drinking bad, posionous water - sure, that happens.
Well, you could drink salt water if you wanted to. But drinking too much salt water can be deadly. What happens is the salt in the water draws water out of your cells. That's why your skin feels dry when you come out of the ocean. So if you put that salty water into your body, the same thing happens, but internally. In short, drinking salt water is actually dehydrating yourself.