1 In the natural environment, mussels generally live in muddy, sandy or gravel such as rivers, lakes, ponds and streams. When it is cold in winter and spring, the axe foot is used to dig the mud fen, so that the mussel body is partially submerged in the sediment, with the front belly edge downward and the back edge upward; Only the rear edge of the shell is exposed for breathing and feeding. In hot weather, most of them are exposed outside the mud. The toothless mussel generally lives in still water with a muddy bottom and a pH value of 5 ~ 9 or in slow-flowing fat water.
2. The food of mussels is mainly unicellular algae, protozoa and organic debris, such as rotifers, flagellates, green eyes, green algae, scenedesmus, navicular algae, dinoflagellate, tetragonal algae, spindle diatoms, cladosporium, crustacean debris and plant leaves. Diatoms are mainly digestible. The mussel can't actively chase the food, depending on the opening and closing of the mussel shell, the oscillation of the inner cilia and gill cilia of the mantle causes the water flow, and the food enters the mussel body with the water. Food enters the coat cavity with water, and the particles move up along the gill filaments to the base of the gill, and then move forward to the lip. After being selected by the lip, the small particles enter the mouth, while the large particles move backward from the edge of the inner gill, and at the intersection of the two gills, they enter the coat membrane to the back end, and the two shells slam and are discharged from the body. According to some statistics, the water flowing into the mussel body can reach 40 liters every day.