You can put some bean flour properly, not too much, just a little. Mussels are a kind of animals in mollusca (Unionidae), which are 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 cultivation, and Hyriopsis cumingii and Cremantria plicata are mainly used for pearl cultivation.
In some places, it is called mussel shell, which lives at the bottom of freshwater lakes, ponds and rivers, and is half buried in sediment. The water inlet and outlet pipes at the rear end of the body are exposed, so that water can flow in and out of the jacket cavity, so as to complete the functions of feeding, breathing, excreting feces and metabolites, and filtering tiny organisms and organic particles in the water.