1, head: bighead chub head, equivalent to 1/3 of the length of the body, the upper jaw slightly protruding forward; bighead chub head is small, equivalent to 1/4 of the length of the body, the lower jaw is slightly protruding forward;
2, body color: bighead chub back of the body for the dark brown, with a fine black spot, the abdomen for the grayish-white, the fins are pale gray; white chub body back of the gray, with a fine spot, the fins are light gray! Chub body back is gray, the abdomen is silver-white, all fins are gray-white;
3, pectoral fins: chub pectoral fins are larger than the base of the ventral fins, a lot; chub pectoral fins smaller, the tip of the pectoral fins only up to the base of the ventral fins;
4, abdominal ridge: chub abdominal ridge is from the ventral fins to the anus, abdominal prongs shorter; chub abdominal prongs is from the chest to the anus, abdominal prongs longer;
5, texture.5. Taste: chub has a better taste and higher nutritional value than white chub.