Boga

Megaleporinus obtusidens is a South American species of headstander that inhabits the basins of the Paraná River and the Río de la Plata, the Uruguay River, and the São Francisco River . It may be found in the main courses and streams, as well as in lakes and lagoons; it often shelters among stones and aquatic vegetation. In Argentina and Uruguay its common name is boga (sometimes augmentative bogón); in Brazil it is known as piapara. There is also a variant called piava and another called tres puntos ("three dots"). This species is also known by the technical synonym Curimatus obtusidens. The common name boga is applied to many other species of fish, usually unrelated to this one.

Source: Wikipedia