Electric Blue Hap

The electric blue hap is a predatory haplochromine cichlid endemic to Lake Malawi in the African Rift Valley. It belongs to a group of rock- and sand-dwelling cichlids commonly called "haps," distinguished from the smaller algae-grazing mbuna by their more elongated, streamlined bodies and piscivorous habits. Males are famous in the aquarium trade for their saturated electric-blue coloration, one of the most intense blues found in any freshwater fish. As with most Lake Malawi cichlids, it is part of an extraordinary adaptive radiation of hundreds of closely related species that evolved within the lake.

• Elongated, moderately compressed, torpedo-shaped body built for open-water hunting
• Mature males are a striking uniform electric blue, often with a black-margined dorsal fin
• Females and juveniles are drab silvery-gray to brownish, lacking the blue coloration
• Large eyes and a slightly upturned, protrusible mouth adapted for catching small fish
• Adults reach 10-14 cm

Males are unmistakable due to their intense blue color, but females closely resemble other female haplochromine cichlids and are difficult to identify without knowing the source population.

Endemic to Lake Malawi, this species inhabits rocky shorelines and adjacent sandy or intermediate rock-sand transition zones at moderate depths, typically a few meters down to around 20 meters. Lake Malawi is a large, ancient, thermally stable Rift Valley lake with clear, warm, mildly alkaline water, generally 24-28°C. The electric blue hap patrols these rocky habitats hunting for smaller fish, often near the territories of mbuna species whose fry and juveniles it preys upon. It does not occur naturally outside Lake Malawi and its immediate connected waters.

This is a solitary, predatory cichlid that actively hunts smaller fish, including the fry of other cichlid species, by stalking and striking near rocky cover. Males are territorial, especially during breeding, and establish display sites among rocks to attract females with their bright coloration. As with virtually all Lake Malawi haplochromines, females are maternal mouthbrooders, collecting fertilized eggs into their mouths after spawning and incubating them for around three weeks before releasing free-swimming fry. Its predatory feeding role makes it an important check on populations of smaller fish within the lake's complex rocky-reef cichlid communities.