How big do peacock cichlids get?

The peacock cichlid (Aulonocara nyassae) can grow to a maximum size of around 12 inches (30 cm) in length, although most specimens are typically between 6 and 8 inches (15 and 20 cm). Male peacock cichlids are generally larger and more colorful than females, and they may develop more elaborate fins and patterns as they mature.