Tuna will be perfectly fine kept in an unopened can
If you’ve ever wondered why tuna fish is sometimes stored in a can, then we’re here to finally answer your pressing question. Canning is a form of preservation, which allows a food to remain in perfect condition, sometimes even for a few years. As refrigeration is also a form of preservation, you don’t need to worry about doing a double-whammy.
Instead, keep your canned tuna in a cool and dark place so that the can is able to do its thing. When you decide that you want to taste some of the canned goodness, remove the leftover tuna from the can, drain any liquid, place it in an airtight container, and then place that container in the fridge.
