Abstract: We studied the body-color polymorphism of cultured Chlamys nobilis populations in Liusha Bay, Leizhou Peninsula. The results show that there are 5 954 individuals from 10 different groups of different seed sources whose shell colors can be classified into 6 categories orange (62.31%), bordeaux-brown (14.51%), purple-white (12.46%), orange-purple (6.43%), purple-bordeaux-brown (3.46%)and orange-purple-yellow (0.82%). The adductors of all categories have 2 colors (white and yellow) with significantly more white than yellow, and the highest ratio for yellow adductor is orange (18.79%). The gonads of mature C.nobilis has 2 colors of yellow (female) and ivory (male). The sex ratio is correlated with the color of adductor. It is revealed that orange is the primary shell color (P < 0.05) while white is the primary adductor color (P < 0.05) for C.nobilis; the colors of shell and adductor have certain relationship; individuals with yellow shell color have higher ratio of yellow adductor (P < 0.05);the ratio of female is significantly higher than male for population with yellow adductor (P < 0.01).