1, grass carp's body is long and thin, and its head is pointed;
2, carp has a beard, and the head is a little bowed;
3. Crucian carp is similar to carp, but it has no beard, but its scales are bigger than those of crucian carp.
Carp, with flat body and round abdomen, horseshoe-shaped mouth and 2 pairs of whiskers. The base of dorsal fin is long, and both dorsal fin and gluteal fin have a thick hard spine with sawtooth. The side is golden yellow, and the lower leaf of caudal fin is orange red. Carp usually inhabit the bottom of water bodies with aquatic plants in rivers, lakes, reservoirs and ponds, and mainly feed on benthos. It has strong adaptability, cold resistance, alkali resistance and hypoxia resistance. They can lay eggs in running water or still water, and the spawning places are mostly in water grass, and the eggs adhere to the water grass to develop. Carp is one of the freshwater fishes with the largest variety, the widest distribution, the longest breeding history and the highest yield.
Grass carp is a genus of Cypriniformes, Cyprinidae, Yarrainae. The common names of grass carp are: pomfret, pomfret, grass pomfret, white pomfret, grass carp, grass roots (northeast), hybrid, black herring and so on. English name: Grass? carp? . Rivers and lakes inhabiting plain areas generally prefer to live in the middle and lower layers of water and coastal areas with many aquatic plants. Sexually active, swimming fast, often foraging in groups. It is a typical herbivorous fish. Overwintering in the deep water of the main stream or lake. Parent fish have the habit of swimming upstream in reproductive season. It has been transplanted to many countries in Asia, Europe, America and Africa. Because of its rapid growth and wide sources of feed, it is one of the four major freshwater fishes in China. Grass carp has dark brown back, dark brown scales, grayish yellow chest and ventral fins, straight lateral lines, tender meat and few bone spurs, so it is suitable for cutting flowers as modeling dishes such as chrysanthemum fish.
Carassius auratus is a common freshwater fish in Europe and Asia, and it is one of the fishes of the genus Carassius, CYPRINIDAE, Actinidia. After artificial breeding and breeding, crucian carp can produce many new varieties. For example, goldfish is an ornamental fish, which has the same scientific name as edible wild crucian carp. Carassius? auratus? . ? Crucian carp is mainly an omnivorous fish that feeds on plants. It likes to live in groups and chooses to eat. The meat is tender, with high nutritional value. Every 100 grams of meat contains protein? 13g, fat? 1 1 g, and contains a lot of minerals such as calcium, phosphorus and iron. Carassius auratus has high medicinal value, and its nature is flat and sweet. When it enters the stomach and kidney, it has the effects of harmonizing the middle energizer, tonifying deficiency, eliminating sputum, warming the stomach and eating, and invigorating the middle energizer. Carassius auratus is widely distributed, and it is produced all over the country all the year round. The crucian carp in February ~ April and August ~1February is the fattest and one of the important edible fish in China. The maximum length is about 30 cm, and the habitat depth is 0 ~ 20 meters. It is non-toxic, economical and edible fish with good quality and low price. It is mostly produced in the Yellow River basin and the Yangtze River basin, and the crucian carp in Erhai Lake is more famous.