3 Signs Your Canned Tuna Has Gone Bad

Check the can before opening Bulging, leaking, or dented cans near the seal indicate spoilage or botulism risk. Toss the entire can without opening it.

Smell it after opening Fresh tuna smells like the ocean. If it smells like ammonia, sour, or off in any way, throw it away.

Look at the color and texture Good tuna is pinkish-white with firm flakes. If it is brown, grey, slimy, or has an unusual oily sheen, discard it immediately.