Rio Farinha is a river flowing through the state of Maranhão in northeastern Brazil, situated within the Cerrado biome — one of the world's most biodiverse tropical savannas. The river is part of a larger watershed basin that experiences pronounced seasonal variation, with distinct wet and dry seasons shaping water quality, aquatic life, and fishing conditions throughout the year. The Cerrado landscape surrounding the river is characterized by its unique mix of gallery forests, open savannas, and seasonally flooded areas, creating a rich and varied riparian environment that supports a diverse community of freshwater fish.