Can crayfish be sent in a vacuum bag?

Of course. Crayfish, also known as Procambarus clarkii, is a kind of freshwater shrimp, belonging to crayfish subfamily, Crustacea and Arthropoda. When mailing, you need to cool it with cold water, then put it in a fresh-keeping bag or vacuum bag, seal the package and put it in the refrigerator for freezing, and then take a small plastic box suitable for the number of lobsters and put it in several packs of ice bags for mailing.