CR

Haplochromis argenteus

Declining

Overview

Haplochromis argenteus is a critically endangered species of cichlid fish that is endemic to the Lake Victoria system in Africa. This species reaches a standard length of 20.2 cm (8.0 in). The species declined rapidly after the Nile perch was introduced to Lake Victoria.

Last reported from this lake in 1983, it was considered possibly extinct when evaluated by the IUCN in 2010. However, that same year, several were recorded during a fish survey of Lake Bisina, a satellite lake of Lake Kyoga.

Haplochromis argenteus faces severe threats from the introduction of Nile perch (Lates niloticus) into Lake Victoria, which has caused dramatic population declines through predation and competition. Eutrophication from agricultural runoff and sewage has degraded water quality and reduced oxygen levels in the lake's deeper waters where this species historically occurred. Overfishing and destructive fishing practices have further reduced population numbers and disrupted the lake's ecological balance.

Threat summary

Habitat

Haplochromis argenteus is endemic to Lake Victoria in East Africa, where it inhabits rocky shores and deeper waters of the lake. This cichlid species was historically found in areas with rocky substrates and clear waters, typically at depths ranging from shallow littoral zones to moderate depths.

Rocky areas· major

Conservation measures underway

Species recoveryPolicies and regulations

Frequently asked questions

Why is Haplochromis argenteus classified as Critically Endangered?
Haplochromis argenteus 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 argenteus faces severe threats from the introduction of Nile perch (Lates niloticus) into Lake Victoria, which has caused dramatic population declines through predation and competition. Eutrophication from agricultural runoff and sewage has degraded water quality and reduced oxygen levels in the lake's deeper waters where this species historically occurred. Overfishing and destructive fishing practices have further reduced population numbers and disrupted the lake's ecological balance.
Where does Haplochromis argenteus live?
Haplochromis argenteus 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 argenteus?
The main threats to Haplochromis argenteus 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.

Get weekly conservation intelligence

One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.

Free, no spam. One-click unsubscribe in every email.