3 Signs Your Canned Tuna Has Gone Bad

Smell it The first sign is a sour, ammonia-like, or extra fishy odor that is stronger than usual. Fresh canned tuna has a mild smell, and that changes quickly once it turns.

Check the texture and color Fresh tuna should be flaky and moist, not slimy or mushy. If it feels slick or looks like it’s breaking down into paste, toss it. Color can shift from pinkish or light tan to grey or brown.

Know the time limit Store opened tuna in a sealed container for a maximum of two days. After that, do not gamble — food poisoning from bad tuna is miserable. When in doubt, throw it out.