Fresh shellfish column is a fresh large shell inside a round muscle, this fresh shellfish column fishy flavor is heavier, if you do not carry out the blanching operation, it will lead to cooking out of the fresh shellfish column earthy flavor, so you need to blanch.
Shellfish column refers to shellfish closed-shell muscle dried products edible meat, cylindrical, so called shellfish column, shellfish column is a general term for shellfish closed-shell muscle dried products.