Laguna Melincué is a vast endorheic lake nestled in the General López Department of Santa Fe Province, Argentina, situated adjacent to the town of Melincué at approximately 33°42′24″S 61°29′4″W. Spanning roughly 120 square kilometers, this expansive shallow lagoon sits at an elevation of about 86 meters above sea level and is one of the most ecologically significant wetlands in the region. The lake's defining characteristic is its broad, shallow profile, creating a unique flatwater environment that supports a rich and diverse ecosystem. In periods of drought, the lake's waters can become saline, a natural fluctuation that influences the fish community and overall habitat. The surrounding riparian zone is characterized by reed beds, totora sedge banks, and native vegetation including chañars and espinillos, providing excellent habitat structure along the shoreline. The warm and humid climate of the Argentine Litoral region shapes the lake's seasonal rhythms and makes it a productive fishery throughout much of the year.