Engineering crucian carp has a beard. The engineering crucian carp has a pair of smaller beards on its mouth, with a fat body, a flat abdomen, a white back and a thick lip. Scale arrangement of engineering crucian carp is disordered. When distinguishing between engineering crucian carp and local crucian carp, the most obvious thing is that local crucian carp has no whiskers, and engineering crucian carp has whiskers, which is its posture characteristic, so engineering crucian carp has whiskers.