The occurrence of the bream Tilapia mossambica Peters from pools in the Namib Desert is documented. The aquatic vertebrates Cyprinus carpio, Barbus anoplus, Hepsetia breviceps and Pyxicephalus delalandei are also listed. The origin and dispersal of T. mossambica stock in South West Africa is discussed. Amongst established freshwater fish populations many individuals show signs of malnutrition. Keywords: Aquatic animals, Freshwater biome, Perennial pools, Hoarusib river, Euryhaline species, Kuiseb canyon region.