What parts of the mussel's internal organs should not be eaten, mussels, also known as sea rainbow, is a kind of bivalve mollusks, shells are black-brown, living in the seashore rocks, living in China's Yellow Sea, Bohai Sea, East China Sea coast, is a common edible shellfish. In order to be safe for consumption, mussels must have their internal organs removed before cooking. Mussels can be eaten in their entirety as long as they are cooked. If you want a better taste, you can remove the black flotsam from the mussel meat, that is the fecal matter. The black part of the mussel is its stomach and intestines, which contains undigested or semi-digested things that the mussel has eaten, which may not be clean and may contain various microorganisms and bacteria, and may also contain sediment, so it needs to be cleaned.