A popular Illinois lake is on guard after the discovery in its waters of the exotic pacu fish - infamous for killing men by ripping off their testicles.
Families reported being wary of entering the waters of Lake Lou Yaeger after hearing that a pacu was caught by a fisherman on June 7 and that another one had been spotted two weeks later.
Known in Papua New Guinea as 'The Ball Cutter', the pacu has reportedly been responsible for the deaths of two fishermen in the Pacific nation, who died from blood loss after the fish had bitten off their testicles.
Initially thought to be a piranha, the fish caught in June was later confirmed by the Illinois Department of Natural Resources to be a pacu.
Although part of the same family, the pacu has thicker, sturdier teeth that resemble human ones, unlike the piranha, which is renowned for its deadly serrated incisors.
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