The rank of toxicity to the antioxidant enzyme(SOD and GPx) of the haemolymph of Charybdis japonica was Hg~(2+)>Cd~(2+)>Cu~(2+)>Pb~(2+).

• 4种重金属离子对日本血淋巴SOD,GPx活力的毒性大小为:Hg2+>Cd2+>Cu2+>Pb2+。