Image source: Jo's Animal Database
Vieja melanurus, the quetzal cichlid, redhead cichlid or firehead cichlid, is a species of cichlid that is native to the Lake Petén system, the Grijalva–Usumacinta River basin and other Atlantic river drainages in southern Mexico, Belize and Guatemala, with introduced populations in a few other countries. It typically inhabits slow-moving or standing waters such as rivers, lakes and lagoons; although primarily a freshwater fish, it may occur in slightly brackish habitats. It is almost entirely herbivorous, but may also take small animal prey. V. melanurus can reach a total length of 35 cm (14 in). Males grow larger than females and also develop a prominent nuchal hump on their forehead. Adults are quite colourful cichlids with an orange to pinkish-red head, a body often displaying greenish, bluish, pink and golden-orange, and a horizontal black bar (often patchy or mottled) at the base of the tail; the belly and mottling elsewhere on the body can also be black. There are significant individual and geographical variations in the colours; partially, this is related to the clarity of the water at a location. Adults are always robust and high-bodied cichlids, but there are some regional variations depending on habitat.
