Piranha fish is best known for their sharp tooth and extreme carnivore nature. Scientific Classification– Class: Actinopterygii, Order: Characiformes, Family: Characidae, Subfamily: Serrasalminae, Tribe: Piranha.. Pristobrycon, Pygocentrus, Pygopristis and Serrasalmus are considered true Piranhas. Life span is- 10 yrs in average may be upto 20 years Length 6-9 inches but some times may reach upto […]