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A: Once your canned tuna has been opened it must be kept in a refrigerator if you did not eat all of it. If wrapped properly and stored in your fridge it should last for around three days.
A fresh tuna steak is either flash frozen and thawed, or caught recently and sent directly to your grocer. It doesnât stay fresh for long. Once you get your tuna steak home, eat it within 24 hours. If you picked it up a few ago and havenât had a chance to eat it, it could be bad. Canned tuna has a âsell-byâ or âbest if used byâ date stamped on it. While tuna can certainly be safe to eat past these dates, itâs safer just to throw the cans or pouches away.