Piranha teeth have the tough task of crunching bone and shredding flesh and, like well-used kitchen knives, they dull over time. Since they have no way to sharpen their teeth, piranhas lose and regrow ...

Add Yahoo as a preferred source to see more of our stories on Google. A close up picture of two piranha fish with their sharp triangular teeth exposed. A close up picture of two piranha fish with ...

The a-pacu-lypse is upon us. As if US waterways weren’t teeming with enough invasive fish of late, a Texas angler caught a South American piranha relative with “human teeth” at a local lake on Sunday.

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 ...