Claim: The red-bellied pacu, an invasive species related to the piranha but with human-like teeth, is known to have bitten off men's testicles, killing at least two victims.
Fact-check: 'Ball Biter': How Dangerous Is the Pacu Fish, Really?
Verdict: mostly false
Organisation: Snopes
Author: David Emery
Date published: 2016-08-15T08:12:42