
Pacu is a common name used in the aquarium trade to refer to several common species of omnivorous South American freshwater fish that are related to the piranha. Wikipedia
South American tourist agencies are quick to point out that nude bathing is still alive and well in their waters. Despite the threat of a little testicle munching, tourists are still flocking to discover the distinct charms of the Amazonian Sucker fish. Of course, no journey into the continent’s dark waters can be complete without an encounter with the Peruvian Tickler, the Brazilian Naughty Wiggler or the Bolivian Buttock Slapper (once thought to be a member of the trout family, recently discovered to be a burly fisherman armed with a paddle).