Tilapia guinasana
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Otjikoto_tilapia
Overview
The Otjikoto tilapia is a critically endangered species of cichlid fish endemic to Namibia where it was originally only found in Lake Guinas. This very small sinkhole lake contains quite clear water that generally ranges between 18 and 25 °C depending on season, and the Otjikoto tilapia has been seen down to depths of 67 m (220 ft). Despite deriving its common name from the nearby Lake Otjikoto, it in not native to that lake, rather being an introduced species.
It is rare in the aquarium trade and also kept in garden ponds in southern Africa.
Tilapia guinasana faces severe threats from habitat degradation and water pollution in its limited freshwater range. The species is particularly vulnerable to agricultural runoff and sedimentation that degrades water quality in its native river systems. Introduction of non-native fish species poses additional competitive pressure, while dam construction and water extraction for irrigation further fragment and reduce available habitat.
Habitat
This freshwater cichlid inhabits rivers, streams, and associated wetlands in tropical African freshwater systems. The species requires clean, well-oxygenated waters with rocky or sandy substrates for feeding and breeding.
