Calcium alginate was coated on fishes of grouper, flat bream, genuine porgy, Japanese seabass, greater yellow croaker, etc to extend their storage life in ice box. The chemical and physical indexes of freshness such as K value, TMA (trimethyl amine), VB N (volatile base nitrogen), total counts of bacteria, and sensory evaluation were measered to record the storage life of fishes in ice. The experimental results showed that under the same storage conditions, the keeping quality of samples with Ca alginate film coated was much superior to those with no film coated, and also the low counts of bacteria were found in the coated samples. It is indicated that the Ca alginate coating can be used to extend the storage life of fishes for 4 5 days.