Dulse (Palmaria palmata (L.) Kuntze), also called dillisk, dilsk, dulse or creathnach, is a red alga (Rhodophyta) that grows on the northern coasts of the Atlantic and Pacific oceans, it is a well-known snack food. In Iceland, where it is known as söl, it has been an important source of fiber through the centuries, but is now consumed as snack food.