Sandao scale is a kind of carp, there are three thick scales on the body, so it is named Sandao scale. Also known as the three carp, this carp is big and fat, and the meat is very tasty, moderate spines, only near the sides of the fins and the middle of the tail near the place of the scales, and the middle of the phosphorus is only three pieces.
The crucian carp (referred to as crucian carp, commonly known as crucian carp melon seeds, moon crucian carp, earth crucian carp, fine head, perch, cold perch) in the Eurasian region for the common freshwater fish, for the spoke-finned fish class carp order carp family crucian carp one of the genus of fish. Carp through artificial breeding and selection, can produce many new species, such as goldfish is produced by a kind of ornamental fish, and edible wild crucian carp scientific name for .