Scandinavian skinny dippers warned of testicle-biting fish

9:49 AM, Aug 12, 2013   |    comments
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(CNN) -- There is an unusual warning for male skinny dippers in Scandanavia. Wildlife officials say they should watch out for an invasive species of fish that is infamous for biting testicles!

A fisherman discovered it recently in the Danish-Swedish Strait of ├śresund. It's called a pacu and it is native to South America.

Experts with the Natural History Museum of Denmark say it's unclear how the fish wound up in the strait. Pacu fish are generally considered the vegetarian cousins of the piranha.

They are known for crushing nuts with their powerful jaws, and experts say they can sometimes mistake the male reproductive organs for their favorite snack.

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