The pacu fish, originally from the Amazon Basin, has recently been caught in Lake Lou Yaegar in Illinois and is famously known for biting at the testicles of fishermen.
The Illinois Department of Natural Resources identified the species, which is a cousin to the piranha. Some reports also note that another pacu was seen weeks later. Biologists says the species might be aquarium pets and anyone found dumping the fish in the lake can be criminally charged.
The pacu can weigh up to 55 pounds and eats nuts, aquatic vegetation and snails, but is known as the “ball cutter” in Papua New Guinea said British Fisherman, Jeremy Wade. In the 1990′s, the pacu was introduced into Papua New Guinea’s rivers as a food source, for locals, after overfishing.
In 2011, Wade said locals informed him that two fisherman had died from blood loss after something in the water had bitten off their testicles, according to the Metro.
“The locals told me that this thing was like a human in the water, biting at the testicles of fishermen,” Wade said.
Wade determined that the perpetrator was the pacu, which is known for having human-like teeth. The angler did note that such attacks are uncommon, the Daily Mail reports.