Callochromis pleurospilus is a maternal mouthbrooder with a distinct sexual dimorphism; while the males are gorgeously coloured, the females are much more anonymous dressed in silver. A very special feature linked with all Callochromis species are the unique egg-spot on the males’ anal fin, appearing as a orange-red band, which can’t be found in any other mouthbrooding cichlid in Lake Tanganyika.