Abstract: Two obvious conditions exist in the scales of Oujiang color carp, Cyprinus carpio var. color. Form one is hard,transparentinsert skin section,smooth back region (named form A)and form two is soft,notsmoothinsert skin section,fold back region (named form B). We analyzed of two types of scales of the same size, the same age and the same parts . The SEM result showed that theformBscalesshowedmore chaotic permutation, and the distances between two scale ridges showed F＞F0.01（1,268）=54.095，（P＜0.01）. The paraffin sections result showed that thethickness of form A scales (109.53±3.74)μm is more thick than the soft scales (55.450±7.40)μm, and the fiber layer of hard scales showed layered distribution,and the bone layer of hard is thicker. The DigiEye result showed that the color is different soft scales and hard scales. There were significant differences between soft scales and hard scales,and these may lead to differences between form A scales and form B scales. On the basis of the previous research results: A, B two types scales morphology, biochemical composition and color in the presence of significant differences, which may resulted in the Oujiang color common carp scales hardness, transparency and color of different.

Key words: Oujiang color common carp, SEM, paraffin sections, DigiEye