10.22376/ijpbs.2019.10.1.p1-12 Volume 4 Issue 2 2013 (April - June) A systemic study has been undertaken to establish a baseline data on the profiles of on the heavy metals (Cu, Cr, Zn, Ni, Pb and Cd) in the biota of Ennore Creek environment. Samples of fishes ( lessThan i greaterThan Oreochromis mossambica lessThan /i greaterThan , lessThan i greaterThan Mugil lessThan /i greaterThan lessThan i greaterThan cephalus, lessThan /i greaterThan lessThan i greaterThan Clarias batrachus lessThan /i greaterThan and lessThan i greaterThan Channos lessThan /i greaterThan lessThan i greaterThan channos lessThan /i greaterThan ), shrimps ( lessThan i greaterThan Penaeus monodon lessThan /i greaterThan and lessThan i greaterThan Penaeus indicus lessThan /i greaterThan ), crab ( lessThan i greaterThan Portunus pelagicus lessThan /i greaterThan ) and mussels ( lessThan i greaterThan Perna viridis, Mytilus gravincia provincialis lessThan /i greaterThan and lessThan i greaterThan Crassostrea madrasensis lessThan /i greaterThan ) have been subjected to analyses. These selected biota have highly commercial value and are edible. The concentrations of Pb and Cd in the mussels (6.4 ± 0.52 mg.kg lessThan sup greaterThan -1 lessThan /sup greaterThan and 3.9 ± 0.40 mg.kg lessThan sup greaterThan -1 lessThan /sup greaterThan respectively) exceeding the permissible limits recommended by FAO, USFDA and European Commission for food standards. The concentration of heavy metals (Cu (11.1 to 19.0 ), Ni (0.9 to 6.35), Cr (1.43 to 3.56), Cd (0 to 2.4), Pb (0.7 to 3.7) and Zn (4.6 to 24.0) mg.kg lessThan sup greaterThan -1 lessThan /sup greaterThan ) in the fish and crustaceans (Cu (15.9to 21.1), Ni (5.7 to 8.8), Cr (1.9 to 2.3), Cd (1.7 to 2.5), Pb (2.0 to 2.8) and Zn (47.8 to 56.7) mg.kg lessThan sup greaterThan -1 lessThan /sup greaterThan ) species also moderately higher and slightly exceeding the permissible limits. The bivalve mollusc, lessThan i greaterThan Crassostrea madrasensis lessThan /i greaterThan have been identified to accumulate higher concentrations of non-essential (Cu (22.3 to 26.3), Ni (7.36 to 10.4), Cr (2.73 to 4.63), Cd (2.3 to 3.90) and Pb (5.2 to 6.40) mg.kg lessThan sup greaterThan -1 lessThan /sup greaterThan ) and essential (Zn (90.1 to 157) mg.kg lessThan sup greaterThan -1 lessThan /sup greaterThan ) heavy metals suggesting that they could serve as bioindicator of severe heavy metal pollution in the Ennore Creek environment. P. CHITRARASU, A. JAWAHAR ALI AND T. BABUTHANGADURAI Ennore Creek; heavy metals; bioaccumulation; Biota 1063-1069