Cucullia lactucae, the lettuce shark, is a moth of the family Noctuidae. The species was first described by Michael Denis and Ignaz Schiffermüller in 1775. It is found in most of Europe, Turkey, the Caucasus and east across the Palearctic to the Altai Mountains. In the Alps it rises to 1,800 metres (5,900 ft). It is found mainly in barren places, on weeds and debris and scree corridors on slopes, shrubby edges and in vineyards, gardens and parks.