A Behavioral, Morphological and Growth Rate Alterations in Fresh Water Fish Tilapia mossambicaunder Fluoridation, Keenjhar Lake, Thatta, Sindh, Pakistan

Fluoride is the most electronegative and active nonmetallic element. Fluoride has been known as a strong, persistent potent cumulative toxic agent, occurs naturally widely distributed in the rivers, lakes and seas of world. Fish and other aquatic animals tend to accumulate fluoride from the environment, chiefly in the skeleton (including the gills) and exoskeleton. Fluoride toxicity was studied to average weight 94.5gand standard length 24.62cmfresh water fish,Tilapia mossambica after their exposure to sub lethal concentration (1.5g/70 L and 3.0 g/70L NaF) for 7 days, 14 days, 21days and 28 days. A reduction in weight, length and growth were recorded in fresh water fish, Tilapia mossambicaafter their exposure to both sub lethal concentration of fluoride. The current investigations proposed that the long term administration of inorganic fluoride to laboratory fish have established that fluoride can elicit impairment of behavior, morphological and growth development.