Wikipedia Article About Dulse on Wikipedia Dulse (Palmaria palmata), also called dillisk or creathnach, is a red alga that grows along the northern coasts of the Atlantic and Pacific oceans, where it is a traditional food. In Northern Ireland it is a well-known snack food. Dulse grows attached to rocks by a holdfast. It is commonly used in Ireland and Atlantic Canada both as food and medicinally and is now shipped around the globe. Dulse is found in many health food stores or fish markets or can be ordered directly from local distributors.