Distribution and Habitat
The Cornish jack occurs in the White Nile, the Lake Albert drainage basin, inland waters from Senegal to Chad, rivers in Cameroon, and small coastal basins in the Guinean zone. It is also widespread in the Congo River basin, Lakes Malawi and Tanganyika, the Volta River basin, the Whebi Shebeli River, and the Jubba River. In southern Africa, it is restricted to the middle and lower Zambezi, and the Buzi and Pungwe Rivers.
This demersal species is found in tropical freshwater habitats between 22 and 24 degrees C. The juveniles are found in marginal habitats, while the adults prefer deep, quiet water between boulders and below overhangs, away from strong currents. They also occur beneath Salvinia mats and in river estuaries in Lake Kariba.
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