Mussels contain protein, fat, sugar, calcium, phosphorus, iron and other nutrients. When cleaning, break it along the seam with a knife. 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, soft in texture and have gill-like texture inside. They should be removed. The intestine is tubular beside the gills, and there are black deposits in it. One end of the intestine is connected with the mussel body, so they should be 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, dinoflagellate, tetragonal algae, fusiform diatoms, Cladosporium, crustacean debris and plant leaves.

Diatoms are mainly digestible. Mytilus can't actively chase food, but depends on the opening and closing of mussels. The oscillation of cilia and gill cilia in the mantle causes water flow, and 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 forward to the lips. After being selected by the lips, the small particles enter the mouth, the large particles move backwards from the edge of the inner gill, enter the capsule at the junction of the two gills to the back end, and the two shells are slammed out of the body.