Pacú Fish
Also in the Characidae family, Piaractus mesopotamicus is the species known as Pacú in the north of Argentina. This powerful round-shaped fish can get seriously big, sometimes tipping the scales at over 30 lbs. Like Pirá Pitá, Pacú are omnivorous, and chances are you will find them surface feeding on fruit or insects—producing perfect sight-fishing scenarios that leave any fly angler drooling. Finding big Pacú eating slowly on the surface, under a tree, for instance, can be thrilling.