Rio Sapucaí winds through the southern highlands of Minas Gerais, Brazil, draining into the upper Rio Paraná system. This river and its network of tributary streams flow through a biologically rich region characterized by diverse aquatic habitats, supporting an impressive array of native fish species. The basin spans a range of stream environments, from smaller headwater tributaries to broader lower-river sections, each offering distinct fishing opportunities. The lower Rio Sapucaí region is particularly notable for its fish diversity, with Characidae and Heptapteridae families dominating the ichthyofauna.