The Fenestratus Cichlid (Vieja fenestrata) is a large, robust, and aggressive freshwater cichlid known for its impressive size and marbled coloration. It is native to southern Mexico and is characterized by its deep body, prominent nuchal hump in dominant males, and a marbled pattern of iridescent white, blue, red, and green. Due to its size and temperament, it is recommended for experienced aquarists with large tanks.