Rio Tatuamunha is a coastal river flowing through the state of Alagoas in northeastern Brazil, emptying into the Atlantic Ocean near the town of Porto de Pedras. The river is situated within the Costa dos Corais Environmental Protection Area, one of Brazil's most significant coastal conservation zones, and is surrounded by extensive mangrove forests that define much of its lower reaches. The meeting point of the river and the sea creates a dynamic estuarine environment where freshwater and saltwater mix, producing a rich and biologically diverse ecosystem. The river's mouth, known locally as the Foz do Rio Tatuamunha, is a striking natural feature where the river's calm, relatively shallow waters converge with the ocean, creating a unique landscape that draws visitors and nature enthusiasts from across the region.