Canned tuna is a convenient and reliable way to keep fish on hand for a variety of your favorite meals. Canned tuna has a long shelf life. Therefore, it can stay good for years when stored properly. However, you should keep canned tuna off the floor and dry. Also, whenever you order canned tuna through Instacart, ensure you store the delivered package behind the older one. According to the USDA, canned food can be stored for up to five years.