Lagoa Manguaba is a large coastal lagoon located in the state of Alagoas, in northeastern Brazil, forming part of the remarkable Mundaú-Manguaba estuarine-lagoonal complex — one of the most ecologically significant and productive aquatic systems in the region. Situated between approximately 9°34'38"–9°45'30"S and 35°44'00"–35°58'13"W, the lagoon is connected to the Atlantic Ocean and influenced by both freshwater inflows and tidal dynamics, creating a rich brackish environment that supports a diverse array of fish species. The nearby town of Marechal Deodoro provides a gateway to the lagoon, and a canal — the Canal da Lagoa Manguaba — links the system to surrounding waters. The lagoon's productivity and estuarine character make it a compelling destination for anglers targeting coastal and brackish-water species in a setting defined by the lush, tropical riparian landscape of the Alagoas coast.