Rio Itapocu is a coastal river in northeastern Santa Catarina state, southern Brazil, stretching approximately 89 kilometers from its headwaters in the Serra do Mar highlands to its mouth at the Atlantic Ocean near Barra Velha. The river originates at the confluence of the Novo River and the Humboldt River in the municipality of Corupá, at an elevation of roughly 800 meters, before flowing eastward through a drainage basin of 2,919 km² that encompasses 12 municipalities, including Jaraguá do Sul, Schroeder, Guaramirim, and Massaranduba. The entire basin lies within the Atlantic Forest (Mata Atlântica) biome, one of the world's most biodiverse and endangered ecosystems. The river's lower reaches connect to the Barra Velha lagoon before emptying into the Atlantic, creating a rich estuarine environment that supports a diverse array of fish species and makes the Itapocu a compelling destination for anglers of all skill levels.