Lobster tails in supermarkets are all cooked. Generally, boxed crayfish are preserved after being cooked. After buying them, you can eat a delicious meal by heating yourself. It's easy to open the box and pour the crayfish directly into the pot to heat it up. You don't need to add other condiments, you can also pour them into a pot and heat them in a microwave oven. Spicy shrimp tails are delicious.