The stress of consecutive blood collectings resulted in evident elevation of plasma glucose level and significant lowering of chemiluminescent response of peripheral blood phagocytes in sea bass (Lateolabrax japonicus). Fish responded to the consecutive stressors in cumulative manners. The plasma glucose level in response to consecutive stressors depended on the stressor intervals. When the plasma glucose level of individual fish was compared with the chemiluminescent response, statistically significant (P<0.05) negative correlations existed.