The bioaccumulation of heavy metals such as zinc, chromium, copper, cadmium and lead were evaluated in the selected fish tissues of Grey Mullet, (Mugil cephalus) The fish organs viz., gill, intestine, liver, kidney and muscle from the selected marine fish was carefully dissected for determination of heavy metals during the year of July 2011 to July 2012 from Kaduvaiyar Estuary, Nagapattinam coastal area, Tamilnadu. The levels of heavy metals were determined using Clicos Sl- 176 double beam Atomic Absorption Spectrophotometer (AAS). The highest concentration copper was observed in the intestine and the lowest concentration chromium was observed in muscles. The level of heavy metals accumulated by the freshwater fish species was exceed, the maximum permissible limits values of heavy metals for international agencies. These levels of heavy metals accumulated by the freshwater fish species might be due to increase in agricultural influx waters, domestic waters and some anthropogenic activities.
