The aim of this study is to make the qualitative and quantitative inventory of the fish population settlement of Kaby Lake. It was conducted every month from May 2017 to April 2018 on Lake Kaby in Bongouanou, in Côte d'Ivoire. Its objective is to characterize the fish fauna. To do this, experimental fisheries were made there, by means of a battery of six monofilament nets of meshs 15, 20, 25, 30, 40, and 60 mm. In this context, four (4) species, divided into three genera and three families, including Oreochromis niloticus (an introduced species), have been inventoried. The results of the study show that the fish population of Lake Kaby is dominated by Clariidae, with two (2) species accounting for 50% of the total fish fauna of this lake. In addition, the Cichlidae and Channidae families are monospecific, representing 25% of the population for each. Finally, this stand remains predominantly dominated by the species Oreochromis niloticus with 90.5 %, representing 76.43 % of the total biomass. Thys study allowed to make the first qualitative and quantitative inventory of the fish population settlement of Kaby lake. These results will serve as a reference for future investigations of this fish fauna and the development of appropriate arrangements to ensure the protection and sustainable exploitation of the services of this lake environment.