On the East Coast, the Buffalo, N.Y., Tops store has a sale on shrimp through Jan. 6. Gold Star extra-large looked cocktail shrimp, tail-on, 31-40 count, are $6.99 (€5.33) a pound. Large simple-peel shrimp, raw, 31-40 count, are $4.99 (€3.80) a pound. A 12-ounce shrimp ring with cocktail sauce, which serves about two people, is $3.99 (€3.04), according to the store's Web site.

At the Albertson’s in Tallahassee, Fla., king crab legs are on sale for $10.99 (€8.38) a pound, and steamed for free.