The Malawi Blue Dolphin (Cyrtocara Moorii), or Hump-head Cichlid, is a popular, bright blue freshwater fish endemic to Lake Malawi. Known for a distinct, dolphin-like head shape that develops with age, they are generally peaceful, grow to roughly 8–10 inches (20-25 cm), and thrive in sandy,, well-oxygenated aquariums with large swimming areas.