ABSTRACT This study focused on aspects of the structure and sustainability of the fisheries in the Cross River estuary with a view to addressing the unsustainable fishing activities in the Cross River estuary. The physicochemical characteristics of water were analyzed in order to determine the quality of water and health status of fishes in the study area. These included surface temperature, pH, DO, turbidity, salinity, alkalinity, phosphate and nitrates. The catch rates and catch composition...