Abstract: The electrophoretic separation of serum proteins and liver esterases on polyacrylamide gradient gel was carried out for gynogenetic crucian carp (Carassius auratus gibelio) and allogynogenetic crucian carp (progeny of gynogenetic crucian carp ♀×red carp ♂). It was found that the serum proteins and liver esterases of both fishes assumed four different phenotypes. The crucian carp and the allogynogenetic crucian carp, both being the progenies of the same maternal crucian carp, possessed the same phenotype as their mother. But in allogynogenetic crucian carp, there were some irregular variations in the electrophoretic patterns of the liver esterase, and this was obviously caused by the action of the heterologous sperm. Moreover, it was found that the growth capacity of these fishes having different phenotypes was diverse from. Their growth differences could be as high as 50%. These results suggested that the natural gynogenetic crucian carp consists of some gynogenetically different clones, and this is very important for the selective breeding of the crucian carp.