The Sulfur Head Peacock (Aulonocara maylandi) is a stunning Lake Malawi cichlid known for its iridescent blue body and bright yellow or orange blaze on its head and dorsal fin, making it a popular but endangered aquarium fish, requiring hard, alkaline water, sandy substrate, rockwork, and peaceful tank mates (other Malawi cichlids, not Mbuna), and it’s a mouthbrooder.

