Haplochromis iris

Haplochromis iris is a critically endangered cichlid fish endemic to Lake Victoria in East Africa. This species belongs to the diverse Haplochromis genus, which historically comprised hundreds of species in the lake's ecosystem. Like many Lake Victoria cichlids, H.

iris evolved as part of one of the most remarkable adaptive radiations in freshwater fish, developing specialized feeding behaviors and ecological niches. The species faces severe population decline and is classified as Critically Endangered by the IUCN. The primary threat to H.

iris has been the introduction of the Nile perch (Lates niloticus) in the 1950s and 1960s, which predated heavily on native cichlid species and disrupted the lake's food web. Additional pressures include habitat degradation from eutrophication caused by agricultural runoff and sewage discharge, which has led to oxygen depletion and algal blooms in parts of Lake Victoria. Overfishing and the use of destructive fishing methods have further impacted cichlid populations.

Water hyacinth invasion has also altered nearshore habitats where many cichlids breed and feed. Conservation efforts for Lake Victoria cichlids include habitat restoration projects, water quality monitoring, and attempts to establish captive breeding programs for the most endangered species. However, the complex ecological changes in Lake Victoria make recovery challenging for many endemic cichlids, including H.

iris.

Haplochromis iris inhabits the waters of Lake Victoria, Africa's largest tropical lake. The species typically occupies nearshore areas and rocky or sandy substrates where it feeds and breeds as part of the lake's complex cichlid community.