Three scales generally refer to mirror carp, also known as German mirror carp, Sanhua carp, German carp and so on. In biological classification, it belongs to freshwater fishes, chordates, teleost fishes, CYPRINIDAE, CYPRINIDAE, and CYPRINIDAE in the animal kingdom. It originated in Europe and was introduced from West Germany in China. After more than 20 years of systematic breeding, Heilongjiang Fisheries Research Institute has selected a mirror carp breeding line suitable for Chinese breeding.
The three scales are slender, flat on the side, slightly spindle-shaped, with a slightly raised back and a shallow arc on the abdominal edge; The head is big, the kiss is blunt and round, the mouth is slightly smaller, down and oblique, with two pairs of whiskers, the kiss is shorter and the jaw is longer; The body has round scales, the lateral line is complete and slightly curved, and the number of scales on the lateral line is 31~ 36; The back of the body is dark gray or yellowish brown, the side is slightly yellowish green, the ventral surface is light gray or silvery white, the base of dorsal fin and caudal fin is slightly black, the pectoral fin and ventral fin are slightly golden yellow, and the caudal fin is bifurcated.
Distribution range of three scales
Sanda originated in Europe and was introduced from West Germany in China. After more than 20 years of systematic breeding, Heilongjiang Fisheries Research Institute has selected mirror carp breeding lines suitable for breeding in most areas of China. The most remarkable feature of this breeding line is that its cold resistance and disease resistance have been greatly improved compared with the original species. Due to the differences in scales and morphology, there are mainly scattered mirror carp, ring mirror carp and frame mirror carp.