Abstract
The effect of cadmium on the freshwater cichlid fish, Oreochromis niloticus was assessed. Various behavioral changes were observed when the fish was exposed to different concentrations (2, 4, 6 and 8 ppm) of cadmium. Its LC sub(50) was 5 multiplied by 2 ppm. Remarkable depletions in liver/muscle glycogen and hemoglobin were observed with increasing concentrations of cadmium. It can be concluded that the aforesaid changes might be useful indicators of the toxic effects of cadmium in the environment.