Environmental contamination from the use of pesticides, metals ranges from water, air and soil pollution to alter the ecosystem resulting in detrimental effect to non-target organisms. Study assessed the behavioural dysfunctions in relation to the toxicity exposed to chronic dose of lead chloride without and with ascorbic acid in freshwater fish, Garra mullya. Behavioural dysfunctions have been documented as indicators of physiological stress. Hyperactivity, erratic, undirected jerky movement of fish exposed to lead chloride is associated with disruption of nervous and muscular coordination. Lethargy, loss of equilibrium and settling down at the bottom prior to death leading to hypoxia. The groups exposed to lead chloride along with ascorbic acid showed recovery than those exposed to only lead chloride. Pre-exposed fishes to lead chloride showed fast recovery than those, which were allowed to cure naturally.
