10.22376/ijpbs.2019.10.1.p1-12 Volume 6 Issue 4 2015 (October - December) The present study was conducted for microbiological assessment of six selected marine species from Nagapattinam district. Total viable colony count, E.coli, Vibrio species, Salmonella species, total yeast count and total mould count were determined in lessThan i greaterThan Stolephorus commorsonnii lessThan /i greaterThan , lessThan i greaterThan Hilsa ilisha lessThan /i greaterThan , lessThan i greaterThan Otolithes ruber lessThan /i greaterThan , lessThan i greaterThan Sardinella longiceps lessThan /i greaterThan , lessThan i greaterThan Ilisha elongata lessThan /i greaterThan and lessThan i greaterThan Penaeus indicus lessThan /i greaterThan . The total viable colony count of the raw fishes and prawn varied from 0.10- 8.30% and the dry fishes and prawn varied from 0.10-1.20%. The lessThan i greaterThan E.coli lessThan /i greaterThan of the raw fishes and prawn varied from 0.20-0.80% and the dry fishes and prawn varied from 0.08 to 0.20%. The vibrio species of raw fishes and prawn varied from 1-4% and the dry fishes and prawn varied from 0.2 – 0.20%.In the present study salmonella, yeast and mold were not detected in both fresh and dried samples. The total viable colony count, lessThan i greaterThan E lessThan /i greaterThan . lessThan i greaterThan coli lessThan /i greaterThan and vibrio species were reduced in the dry fishes while lessThan i greaterThan E.coli lessThan /i greaterThan was completely absent in lessThan i greaterThan Stolephorus commersonnii lessThan /i greaterThan , lessThan i greaterThan Sardinella longiceps lessThan /i greaterThan and lessThan i greaterThan Ilisha elongata lessThan /i greaterThan . DR.B.DHANALAKSHMI AND DR.G.CHITRA Fresh samples, dried samples, microbial analysis. 818-823