Several species of Boulengerella and Cytenolucius (a similar genus) are found in the Amazon basin. Biucuda Cuvieri is an altogether different beast. Attaining weights in excess of 15 pounds, these aggressive fast-start predators are a prized Amazon adversary. Taking to the air instantly, they keep the fight right where the angler can see it, above the water. Their repeated jumps and bony mouths make landing a big specimen an exceptional angling accomplishment.
a bicuda caught in Rio Travessao in Amazon (Brazil) http://www.acuteangling.com/