Looking for delicious oyster recipes? You are at the right place! Oysters were an important food source in all coastal areas where they could be found, and oyster fisheries were an important industry where they were plentiful. Oysters are an excellent source of zinc, iron, calcium and selenium, as well as vitamin A and vitamin B12. Oysters are considered most nutritious when eaten raw but they can be eaten also on the half shell, smoked, boiled, baked, fried, roasted, stewed, canned, pickled, steamed, broiled or used in a variety of drinks.