Mytilus is an animal in mollusca (Mustelidae), which is distributed in freshwater lakes, rivers and ponds in Asia, Europe, North America and North Africa.

Meat is edible, and it is also suitable as bait for fish and poultry and feed for poultry and livestock. In some areas, freshwater pearl mussels are used for pearl culture, while Hyriopsis cumingii and freshwater mussels are mainly used for pearl culture.

Some places are called mussel shells, which live at the bottom of freshwater lakes, ponds and rivers and are half buried in sand. The water inlet and outlet pipes at the rear end of the body are exposed, so that water can enter and exit the sleeve cavity, thereby completing the functions of feeding, breathing, excreting feces and metabolites, and filtering tiny organisms and organic particles in the water.