The most notable piranha incident in recent times came in Argentina in December 2013, when an attack by a school of hungry piranhas saw 70 people injured and several children lose fingers and toes.
In February a six-year-old girl died after she was eaten by piranhas when her canoe capsized in Brazil.
The girl had been on a family holiday with her grandmother and other children when she fell into the water in Rio Maicuru in Monte Alegre.
By the time she was pulled from the water, the killer fish had stripped all the flesh from her legs.