In order to investigate bacterial sanitary condition of fish and shellfish, we examined the normal flora in the 25 species of commercial fish and shellfish, and also proportional change of normal flora by storage period and temperature. Isolated 334 were isolated in the normal fish and shellfish and predominant genera were Pseudomonas (25.2%), Staphylococcus (10%), Acinetobacter (7.2%), Vibrio (6.9%), Micrococcus (5.4%), Aeromonas (5.2%), and Enterobacter (5.2%). In accordance with storage period and temperature, Pseudomonas grew on high ratio at 10℃ steadily, but Proteus had increased proportionally at 20℃ and 30℃. Additionally, Citrobacter, Moganella, and Pasteuralla had increasd, while Achromobacter, Acinetobacter, Yeast, and Micrococcus had decreased by period.