Which is another freshwater species (but not found in the US). Piranha have been found in US waters but aren't a danger yet afaik - just people's released "pets.". But there are plenty of bitey things that are: snakes, eels, etc. You can't always count on freshwater being perfectly safe ito nasty critters.
When I was a kid in Kansas we used to go swimming in the Arkansas River all the time - clean, shallow, not much that could hurt you, until one year every square inch was choked with slithery snakes of almost every species found in the Great Plains, due to flooding further out West. We were a bit more careful about getting into the river after that!