To put into perspective just how brutal the notoriously nippy fish can be, a large group of the fish would be able to ...

with a study in 2012 indicating that the black piranha has the strongest bite found in a living fish. They will eat almost anything when hungry - and there have been fatal attacks on humans ...

A new species of piranha-like fish has been discovered in the Amazon ... Most pacus, for example, have flattened, human-like teeth that help them break down plant matter rather than to rip through ...