2, fish mouth, from the side, the mouth of carp is below the sideways midline, and the mouth of grass carp is in the middle of the sideways midline. Carp's kiss is generous. People who have observed it carefully can find that carp often likes to kiss the mud in the pond, and their lips contract, while grass carp's kiss is shorter.
3, body color, generally the body color of carp is gray-black as the keynote, plus gold, orange and other colors; Grass carp is generally gray-black, carp's tail fin and even buttocks fin are often red, while grass carp's fins are generally gray-black, with no other colors.
4, fins, the base of the carp dorsal fin is generally very long, the dorsal fin of grass carp is relatively short, and the dorsal fin and anal fin of carp generally have a hard thorn.
5, body shape, the upper side of the carp is flat, and the abdomen is blunt and round; Grass carp, like football, is spool-shaped, or spindle-shaped As for carp, the sides are flat and the middle is thick.