Melon seeds belong to bivalve 1 family. Global distribution. Represents a small to medium-sized shell of an animal belonging to the genus Corbicula. The shell is thick and firm, and its shape is round or nearly triangular. The shell surface is shiny, with concentric veins, yellow-brown or brown, and the inner surface of the shell is white or blue-purple. The hinge part has three main teeth, the left shell has 1 front and rear teeth, the right shell has two front and rear teeth, and the upper end of the side teeth has serrations. The feet are big and tongue-shaped. Androgyny or hermaphroditism. Mature eggs or sperm are discharged into water for fertilization, develop into larvae, and then sink to the bottom for benthic life. It can mature in about 3 months. There are also types of viviparous. Habitat in fresh water and Yuxian fresh water. Meat is delicious, with high nutritional value and can be eaten. It is also a natural feed for fish and waterfowl. It is also a traditional Chinese medicine, which has the effects of promoting lactation, improving eyesight, diuresis, dehumidification and detoxification. Shells can be calcined with lime. Clam is the second intermediate host of Echinococcus. The shell of Corbicula fluminea in China is about 40 mm long and 30 mm high. The shell is thick and hard, slightly triangular and slightly symmetrical on both sides. The shell surface is yellow-green, dark brown and black with luster, and the inner surface of the shell is lavender, bright purple and porcelain luster. Habitat in rivers and lakes. Edible, can also be used as bait for fish and poultry, and can also be used as farmland fertilizer.