periwinkles shellfish

Are Periwinkles Seafood? The common periwinkle is scientifically known as Littorina littorea. They are a species of small edible whelk or sea snail that has gills and an operculum. Periwinkles are found in many parts of the world. Are periwinkles escargot? Periwinkles and snails, though they’re not the same, are both gastropods that show up