CR

Haplochromis macrognathus

Declining

Overview

Haplochromis macrognathus is a species of cichlid fish endemic to Lake Victoria in East Africa. This piscivorous species can reach a standard length of 17.4 cm (6.9 in). Last seen in the early 1980s, it may now be extinct.

Haplochromis macrognathus faces severe threats from the introduction of Nile perch (Lates niloticus) into Lake Victoria, which has caused dramatic population declines across endemic cichlid species. Water pollution from agricultural runoff and urban development has degraded water quality in critical breeding areas. Overfishing and destructive fishing practices have further reduced remaining populations, while habitat modification from shoreline development continues to eliminate spawning grounds.

Threat summary

Habitat

This endemic cichlid inhabits the shallow rocky and sandy shores of Lake Victoria, particularly areas with complex substrate structure that provide shelter and breeding sites. The species typically occurs in depths of 2-15 meters where it feeds on invertebrates and small fish among the rocky crevices.

FRESHWATER· major

Conservation measures underway

Species recoveryPolicies and regulations

Frequently asked questions

Why is Haplochromis macrognathus classified as Critically Endangered?
Haplochromis macrognathus is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Haplochromis macrognathus faces severe threats from the introduction of Nile perch (Lates niloticus) into Lake Victoria, which has caused dramatic population declines across endemic cichlid species. Water pollution from agricultural runoff and urban development has degraded water quality in critical breeding areas. Overfishing and destructive fishing practices have further reduced remaining populations, while habitat modification from shoreline development continues to eliminate spawning grounds.
Where does Haplochromis macrognathus live?
Haplochromis macrognathus occurs in Kenya, Tanzania, and Uganda. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Haplochromis macrognathus?
The main threats to Haplochromis macrognathus are 8.3, 9.3, ai-1, and ai-2. The full IUCN-classified threat record for this species is detailed on the species page.

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