yes. they do. like any normal fish.
Vertebrate.
just about anything
Piranas & Anacondas
Salt.
No
aligators an sometimes piranas
bears and some people feed them to piranas
Yes they can so if you want piranas careful with the feeding
eat me- all piranas
Learn where sharks, piranas, and octopuses live and what they eat. Then check statistics on the rate that they kill or eat swimmers.
Swim, Canoe, Kayak, Boating, Swing into it, be careful for piranas and gators and things...
Yes because of their razor sharp teeth and their craving for human flesh.