To know the effects of cadmium chloride concentrations on the level of Lipid peroxidation (LPO) and Superoxide dismutase (SOD) in Liver and Brain tissues of fresh water murrel, Channa punctatus.

The fishes were exposed to cadmium chloride with two different concentrations (20ppm and 40ppm) and the oxidative stress was assessed on 1^st day (24hrs), 5^th day & 10^th day of exposure along with the control group of fishes.

LPO elevates significantly in liver tissue on 1^st, 5^th & 10^th day followed by brain tissue, when compared to control group.

An increased LPO level is due to formation of more lipid radicals.

Superoxide dismutase (SOD) activity decreases initially on 1^st day of exposure of fishes to cadmium chloride when compared with control group of fishes and later it increases in experimental group on 5^th day & 10^th day in liver tissue followed by brain tissue.

Thus, fluctuation in antioxidant enzyme SOD was seen.