How Long Opened Tuna Lasts in the Fridge

Opened tuna keeps for three to four days in the fridge. That’s the USDA recommendation, and it’s a good rule to follow.

After three days, the texture declines and spoilage risk increases. Canned tuna is already cooked, so once opened, it follows the same timeline as any cooked protein.

Trust your senses to decide if it’s still good. If it smells off, tastes metallic, or looks slimy, throw it away.

Store tuna in a sealed container to extend its life by a day or two. Leaving it in the open can shortens its freshness.