First, transfer the tuna out of the can into a sealed container. Metal cans can give off a weird taste, and nobody wants a side of “tin.” Use glass or BPA-free plastic—your future self will thank you.
Press a piece of plastic wrap directly onto the surface of the tuna before closing the lid. Less air contact means slower spoilage. It’s a tiny hack that buys you an extra evening of tuna bliss.
How Long Does Canned Tuna Last In Fridge at Elizabeth Gunther blog
The Smell Test (Your Nose is a Genius)
When in doubt, trust your schnoz. If the tuna smells sour, sulfurous, or just… wrong, toss it. If it smells like tuna—mild and ocean-y—you’re good to go. Your nose is excellent at this game.
Visual cues matter too: any slime, discoloration, or fuzzy growth means it’s time to say goodbye. But honestly, in three days, you’ll probably eat it long before that drama starts.
