Rio Cocó is a river flowing through the state of Ceará in northeastern Brazil, emptying into the Atlantic Ocean near the city of Fortaleza. The river passes through a mix of urban and natural environments, including the Parque Ecológico do Rio Cocó, one of the largest urban parks in Brazil. The lower reaches of the river transition from freshwater to brackish and saltwater environments as they approach the coast, creating a dynamic estuarine zone that supports a rich variety of fish species. This tidal influence is a defining characteristic of the fishery, making Rio Cocó a unique destination where anglers can target both inshore saltwater species and those that move between fresh and brackish water.