The aim of this work was to study the effect of Cu2+ on the activities of antioxidant enzyme CAT,SOD and GSH-PX in the Gill of Chlamys farreri.After 10day's exposure experiment,the results showed that within the range of Cu2+ dosages the activities of CAT and SOD were inhabited in low level of Cu2+,inducted and inhabited with the high level of Cu2+;the activitie of GSH-PX was inhabited and inducted from low level of Cu2+ to high level of Cu2+.The activities of CAT?SOD and GSH-PX were highest at o.oomg·L-1 C...