A piranha or piraña is a member of a family of omnivorous
freshwater fish which live in South American rivers. In Venezuelan
rivers they are called caribes. They are known for their sharp
teeth and an aggressive appetite for meat.
An excavator fell in a river in the Amazon while carrying out work
on a gas-line for Petrobras. The operator broke the glass to free
himself but wounded his hand trying to escape, the blood attracted Piranhas.