CR

Haplochromis nanoserranus

Declining

Overview

A detailed profile for this species is sourced from the IUCN Red List of Threatened Species as assessments become available.

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

Threat summary

Habitat

This endemic cichlid inhabits the rocky shores and shallow waters of Lake Victoria, typically found at depths of 2-15 meters among boulder fields and rocky substrates. The species prefers areas with moderate water flow and abundant algal growth, which provides both food resources and spawning sites in crevices between rocks.

FRESHWATER· major

Conservation measures underway

Species recoveryPolicies and regulations

Frequently asked questions

Why is Haplochromis nanoserranus classified as Critically Endangered?
Haplochromis nanoserranus 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 nanoserranus faces severe threats from the introduction of Nile perch (Lates niloticus) into Lake Victoria, which has caused dramatic population declines across endemic cichlid species. Eutrophication from agricultural runoff and sewage has degraded water quality and reduced oxygen levels in critical breeding areas. Overfishing and destructive fishing practices have further reduced population numbers, while habitat modification from shoreline development continues to eliminate spawning grounds.
Where does Haplochromis nanoserranus live?
Haplochromis nanoserranus 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 nanoserranus?
The main threats to Haplochromis nanoserranus 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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