Testicle munching fish now found in River Seine in Paris In areas where packs proliferate, fishermen have reportedly bled to death after losing their testicles to the fish's crushing jaws. Found in most rivers in the Amazon and Orinoco basins in South America, they have also been spotted in Papua New Guinea, where it is believed they have been introduced to boost fish stocks. After the catch in Sweden, Henrik Carl, a fish expert at the Danish National History Museum, said: "The pace is not normally dangerous to people but it has quite a serious bite. There have been incidents in other countries, such as Papua New Guinea where some men have had their testicles bitten off. "They bite because they're hungry, and testicles sit nicely in their mouth," he explained. "And its mouth is not so big, so of course it normally eats nuts, fruit, and small fish, but human testicles are just a natural target," he added. Paris river police regularly find unusual species in the Seine. Last year they pulled out a headless nine foot long royal python. "It's usually new pets that have grown too big and thoughtless owners abandon in the Seine when they can no longer control them," said the Paris police in its weekly newsletter.