Rio Vaza-Barris is a river system flowing through the northeastern Brazilian state of Bahia, draining toward the Atlantic coast in a region characterized by the semi-arid Caatinga biome transitioning to coastal Atlantic Forest. The river is part of a significant northeastern coastal drainage group that includes rivers such as the Paraguaçu, Itapicuru, Real, and Sergipe, all sharing notable ichthyofaunal similarities. The lower reaches of the Vaza-Barris approach the coast near the border region between Bahia and Sergipe, where the river opens into estuarine and brackish environments that attract a diverse mix of freshwater and marine species. This combination of interior freshwater habitats and coastal estuarine zones makes the Vaza-Barris a genuinely varied fishery, offering anglers opportunities to target everything from small characins in the upper reaches to snook and marine species near the river mouth.