After the mussels are broken open, peel off two pieces of the outer skin on both sides of the mussels, there is a sandwich inside, gray color, texture is not strong, that is not good to eat, to be taken off and thrown away, the left and right have a piece or two pieces. Sometimes there are seeds inside, and parasites, all inedible.

There is also a dark intestine, near the back, which has black food and dirt inside, also to be removed .

The mussels have to be washed to be tasty.