Aspects of the biology of 27 fish species inhabiting the shallow Lake Liambezi are discussed. Gill and seine nets were used to collect fish over an eighteen month period from five stations in the lake. Keywords: Age, Breeding sites, Carborundum disk, Characids, Cichlids, Clariids, Food habit, Freshwater fish biology, GiIl nets, Growth, Limnological characteristics, Mochokids, Mormyridae, PectoraI spines, Reproduction, Scaleless species, Schilbelds, Seine nets, Sex ratio, Spawning season, Zambezi River system.