The difference between crucian carp and carp:

1. Carp is larger and longer, and the average commercial fish is more than 1 kilogram. Crucian carp is smaller and shorter. Generally, commercial fish weigh less than one kilogram, with 0.3 to 0.5 kilograms being the most common.

2. Carp has a long beard on its mouth, while crucian carp has no beard.

Carp: Commonly known as carp, maozi, etc., it belongs to the carp family. The sides of the body are flat and the abdomen is round. The mouth is horseshoe-shaped and has 2 pairs of barbels. The base of the dorsal fin is longer, and both the dorsal and anal fins have a thick, serrated spine. The sides of the body are golden yellow, and the lower leaves of the tail fin are orange-red. Carp usually inhabit the bottom of water bodies covered with aquatic plants in rivers, lakes, reservoirs, and ponds, and feed mainly on benthic animals. The average length of carp is about 35 centimeters (14 inches), but the maximum length can exceed 100 centimeters (40 inches) and weigh more than 22 kilograms (49 pounds).

Crucian carp: The head is like a small carp, the body is black and fat (some are white), the belly is large and the ridge is bulging. Living in soft mud, it can nourish the stomach. In March and April, its meat is thick and its roe is abundant, and it tastes delicious. Crucian carp is a top-quality fish that lives in freshwater waters such as ponds, lakes, and rivers. Body length 15-20 cm. It is streamlined (also called fusiform), with a tall body and flat sides, an arc-shaped front half, a raised back profile, and a wide tail peduncle; the abdomen is round and has no ribs. The head is short and the snout is blunt. No need. The gill rakers are long and the gill filaments are slender. There is a row of hypopharyngeal teeth, flat and flat. The scales are large. The lateral line is slightly curved. The dorsal fin is long and the outer edge is straight. ?The gill rakers are slender, needle-shaped, closely arranged, and the number of gill rakers is 100 to 200. The third spine on the dorsal and anal fins is strong, and the trailing edge is serrated. The end of the pectoral fin reaches the starting point of the pelvic fin. The tail fin is deeply forked, the back of the body is silver-gray with a slight yellow luster, the abdomen is silver-white with a slight yellow luster, and each fin is gray-white. The body color varies depending on the growing water area.