Piranha is a general name used to describe a group of freshwater fish with a fearsome reputation when it comes to feeding. There are between 40 and 60 different species; none grow larger than two feet ...

In something straight out of a childhood nightmare, a swarm of piranhas has been caught on camera munching on a caiman carcass. "Piranhas are often depicted in films as man-eating fish, but the truth ...