Carassius auratus is called Carassius auratus melon seeds in rural areas because it is smaller than other fish species and looks like a big melon seed, so it is called Carassius auratus melon seeds.

Carassius auratus is also called Xitou, River Carassius auratus, Carassius auratus seeds, Moon Carassius auratus, etc. The names will vary from region to region. It is one of the common freshwater fish in China, with strong reproductive ability, strong disease resistance, relatively fast growth rate and low requirements for water temperature and water quality, so it is easy to breed and is an important cultured fish. They mainly feed on plants and like to walk in groups. When eating, it can be braised and boiled in soup, with tender meat and high nutritional value.

Carassius auratus is an omnivorous fish living in fresh water, with a plump body. The life level of crucian carp belongs to the bottom fish. Under normal circumstances, they all swim, feed and inhabit underwater. When the air temperature and water temperature are high, they will also swim and feed in the middle and lower layers and upper layers of water.

Morphological characteristics of crucian carp

1. Body shape: The crucian carp is small, with a flat side and a high body length of about 15-2 cm, with a streamlined body and small scales.

2. Body color: the back color of crucian carp is dim, the abdomen is white, the color is light, and the color of fins is gray-white. The body color of crucian carp varies according to the origin, and most of them are black with metallic luster.

3. Head: The head of crucian carp is small, with a blunt kiss and no fish whiskers. The interval between eyes is wide and convex, and the anterior and posterior nostrils are adjacent and located slightly in front of the eyes. The mouth is anterior and oblique, and the mandible is slightly shorter than the maxilla. Lip developed, unnecessary, branchial foramen large, lateral position, lower end reaching below the angle of anterior branchial lid bone.