Mussels contain many nutrients such as protein, fat, sugar, calcium, phosphorus and iron. When cleaning, use a knife to break it along the seam. White mussel meat and black or different colors between guests are the digestive system of mussels. Don't eat for health. White meat with accurate meat quality is edible meat.

Mussel gills: There are two pieces between the skirt and the mussel meat, which are crescent-shaped and soft, with gill-like texture inside. They should be removed. The intestine is tubular near the gill, with black deposits inside, and one end is connected with the mussel and cut off. The other end is glued to the cylindrical axe foot, torn off, gently squeezed along the mussel body to the hole where the sausage is cut, and the remaining sediment is drained, and the rest can be eaten.

Extended data:

The food of mussels is mainly unicellular algae, protozoa and organic debris, such as rotifers, flagellates, green eyes, green algae, scenedesmus, navicular algae, dinoflagellates, tetragonal algae, spindle diatoms, cladosporium, crustacean debris and plant leaves.

Diatoms are mainly digestible. Mussels can't actively chase food, but rely on the opening and closing of mussel shells, and the oscillation of cilia in mantle and gill cilia causes water flow, and food enters mussels with water.

Food enters the coat cavity with water, and the particles move up along the gill filaments to the gill base, and then move forward to the lips. After being selected by the lips, small particles enter the oral cavity, while large particles move backward from the edge of the inner gill, enter the capsule at the intersection of the two gills, and the two shells are discharged from the body with a bang.