Lagoa do Roteiro is a coastal lagoon located along the southern stretch of the Alagoas coastline in northeastern Brazil, near the municipality of Roteiro. Part of a broader network of estuarine-lagoon ecosystems that define this region's geography, the lagoon sits within a landscape shaped by mangrove areas, coral and sandstone reefs, and the productive coastal waters of the Atlantic. The area around Roteiro is recognized for its rich fisheries resources and serves as an important hub for artisanal fishing communities whose livelihoods and culture are deeply tied to the lagoon and its surrounding waters. Tourism also plays a meaningful role in the local economy, with visitors arriving by schooner (escuna) to cross the lagoon en route to destinations like Gunga Beach, one of the most celebrated beaches in Alagoas. The lagoon is part of a coastal system that includes the Mundaú, Manguaba, Roteiro, and Jequiá da Praia lagoons — all of which support active artisanal fishing traditions in the state.