Abstract: We study the types and distribution of mucous cells in the digestive tract of wild and cultivated yellowfin black porgy (Sparus latus) by using routine paraffin tissue section and AB-PAS staining method. The mucous cells distribute at every section of the alimentary canal of yellowfin black porgy; however, the types and distribution of cells vary at different sections. Type Ⅰ and Ⅱ mucous cells are in the majority in esophagus; cardiac stomach and fundic stomach only have Type Ⅰ and Ⅱ; pyloric stomach only has Type Ⅰ; Type Ⅱ is in the majority in pyloric caeca, intestine and rectum. The difference of wild and cultivated yellowfin black porgy lies in the number of mucous cells which are more in wild fish than in cultivated fish at the same section of digestive tract. It is concluded that the types and distribution of mucous cells in the digestive tract are related with the living condition and food of fish, and probably with the distribution of flora.