Larsen mussels in tomato sauce are shell-less mussels. Mussels are an excellent source of protein, and they bring variety to fish meals. The product is full-canned (pasteurized) without additives and preservatives. Mussels may contain mussel shells and their pieces. The mussels are harvested from MSC-certified sustainable fish stock. www.msc.org/fi. Mussels can be served drained as is, as an appetizer or as a salty snack. They are also suitable for salads, pastas, pies, pizza, soups, and even warm sandwiches. Add the mussels to a hot soup only at the end of cooking so they don't harden.