The Monopterus ablus (average weight: 37.35 ±0.89 g) were bred in the temperature of 28 ±3 ℃. The tissue distribution of immune - related enzymes including the superoxide dismutase ( SOD), alkaline phosphatase ( AKP), acid phosphatase ( ACP), complement eomponents C3 and C4 were examined with enzyme analytieal method. The results showed that : The activity of SOD in different tissues was liver 〉 kidney 〉 spleen 〉mueus 〉 Intestine 〉 blood; the aetivity of ACP ranged as follows : spleen 〉 kidney 〉 liver 〉 intestine 〉 blood ...