Is it bad to put canned tuna in the fridge? (5 Valuable Points)

In this brief guide, we will answer the question, is it bad to put canned tuna in the fridge? We will discuss the correct way to store opened and unopened canned tuna as well as ways to ensure that canned tuna is safe for you. 

Is it bad to put canned tuna in the fridge?

It is not bad to put canned tuna in the fridge but is rather useless. If you accidentally put canned tuna in the refrigerator, check if the can is okay and does not show signs of rust.

If you leave canned tuna in the fridge for a few days, it should not cause any problems. If you leave a can of tuna in the fridge, the moisture can cause it to rust. However, such a problem would arise after it has been left there for months.

The rust, if it exists on the can exterior, is not a cause of concern. However, if the open can of tuna rusts from the inside, it can affect the quality of tuna as well as safety. 

How to store canned tuna?

Canned tuna should be placed in a cool and dry place away from direct sunlight. A good place is your pantry or the wine cellar or a cool and dark cupboard. A high temperature will make your canned tuna spoil quicker than it should. 

How to store canned tuna after opening?

After you open a can of tuna, the first thing is to transfer it to a different container. Use a glass jar or a Ziploc box with an airtight lid. Keep the tuna in the tightly shut container and in the fridge to make it last for a few days or in the freezer for months. 

A closed container not only prevents odor from other food entering your food but also makes the food last a long time by preventing it from bacteria in the environment. 

It is not recommended to keep tuna in its original can after opening. A potential cause of concern is a heavy metal such as tin leaching out of the lining of the can and into your food but the FDA has shunned it and states that it takes years for this to be a concern.

The reason that FDA discourages keeping food in open cans is that it can not be shut tightly and pathogenic bacteria will harm your food. 

How long does canned tuna last?

An unopened can of tuna lasts for years out of the fridge. Canned tuna has a shelf-life of 3 years or longer, depending on the storage condition. 

If your tuna can is open or damaged, the shelf-life will diminish significantly. It will last for a few hours out of the fridge and then need to be thrown away.

Canned tuna is preserved in salt; if left out it may last longer than 2 hours. However, it is best to trust your judgment and play it safe. Eating spoiled tuna can pose a threat to your health.

After you open a can of tuna, it will last 3-4 days in the fridge. It will last you 3-4 months in the freezer.

How is canned tuna prepared?

Canned tuna is a good option as it lasts for months on the shelf. For people who do not have access to fresh seafood, canned seafood is the way to go. Tuna is one of the most nutritious seafood that is packed with iron, selenium, vitamin B6, and potassium.

Tuna fish are caught at sea. A large quantity of tuna is caught by commercial vessels and stored in cold storage until it is sent to canneries. 

After the frozen tuna is then sent to the cannery without allowing the cold chain to break. When the tuna is ready to be processed, it is checked for quality, thawed, and then cleaned. 

The fish is then steam-baked and boiled. A high-heat treatment procedure is important to get rid of all the microorganisms and keep the fish safe. 

Tuna is added to cans by salting, broth, water, and oil. After which the can is vacuum-sealed and sealed and sterilized with aid from a water bath.

How to make sure canned tuna is safe?

Before opening, check that the can appears intact. If the can is rusted, dented, leaking, or misshapen, the food quality might be at stake. The tuna inside might not be safe for you to eat. 

Food such as tuna inside cans is pressure sealed and a release means that the tuna has likely spoiled. 

If the tuna is spoiled, once opened the can will give off an odor or the tuna will have green or brown streaks. 


In this brief guide, we answered the question, is it bad to put canned tuna in the fridge? We discussed the correct way to store opened and unopened canned tuna as well as ways to ensure that canned tuna is safe for you. 


Hi, I am Charlotte, I love cooking and in my previous life, I was a chef. I bring some of my experience to the recipes on this hub and answer your food questions.