Rio Cabaçal is a river flowing through the state of Mato Grosso in western Brazil, situated within the greater Paraguay River basin — one of South America's most productive and diverse freshwater fishing systems. The river winds through the Pantanal transition zone, a region renowned for its extraordinary aquatic biodiversity and the sheer variety of sport fish available to anglers. The surrounding landscape reflects the characteristic mix of cerrado and wetland habitats that define this part of Mato Grosso, providing rich riparian corridors and diverse aquatic environments that support a robust fishery.