Qchlids (family Cichlidae) originate primarily in tropical America and Africa, with a few species in the Middle East and Asia. They are mainly freshwater fishes, though a few species require or tolerate brackish conditions. Size – adult Standard Length (SL) – ranges from 2 cm to 91 cm (3/4 in to 36 in) with a similar diversity in form, diet, and behaviour. Some species are very colourful and are thus attractive aquarium occupants. Many aquarists are, however, attracted by their interesting behaviour, character, and apparent intelligence; large specimens in particular can become genuine pets.