The Lake of Ilopango derives from its name in Nahuat language “Xilopango”, which means “valley of the jilotes” or “place of hedges of jilotes” (Geoffroy Rivas 1961).
It is located 13 km east of the city of San Salvador at of 449 msnm (MARN 2000).
It presents a water mirror of 72.5 km2 with a basin area of 250 km2, an average depth of 240 meters and the maximum depth is 500 meters (MARN 2000).
Fauna lacustrine found: Cichlids; Tilapia (Oreochromis niloticus), Guapote tiger (Parachromis managuensis), Black Mojarra (Amphilophus macracanthus), Burritas (Amatitlania nigrofasciata). And Ariidae, Common Catfish (Ariopsis guatemalensis).