It gives many economical and durable choices. According to USDA standards, you can keep tinned food for 2 to five years, whether it's fish, poultry, pork, or beef. Shellfish like shrimp and also other seafood like scallops can be kept frozen for three to six months. Prepared fish should be maintained frozen for no more than four to 6 months. As well as smoked fish needs to only be kept icy for two months before giving up preference.