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How can the colors of the black carp, koi, and five-colored koi be distinguished?
Introduction to the black carp. The black carp is a carp that is completely pitch-black all over, belonging to the variant koi. As a koi variety, the black carp is derived from the dark blue Asagi. As a branch of the true Asagi carp, the black carp is much blacker all over than the true carp, with its whole body as if coated in black lacquer, the huge German-strain...