recirculating aquaculture system for four weeks. Its body weight was at different temperatures expressed different growth traits. The specific growth rate (SGR) at 22℃ and 28℃ was 22℃ and 28℃ had no evident difference, and daily weight gain (DWG), specific growth rate (SGR), food conversion ratio (FCR) and feed ration (FR) were influenced significantly by water temperature. In this experiment, the influences of water temperature on blood decreased with rising levels increased along with ascending spleen weight index went up at beginning and then went down. Statistic analysis revealed that lysozyme and spleen weight index. However,. Taken together, these results suggest that the optimum growth temperature is stress onwhich causing