How Long Is Canned Tuna Good For Once Opened? (complete guide)

FACT: When it comes to keeping fish on hand, canned tuna is a quick method to prepare a range of nutritious meals…


Tuna, whether canned or fresh, contains vital fatty acids known as omega-3s, which are critical for maintaining proper brain and nerve function as well as cardiovascular health.


This leads us to the question: how long is canned tuna good for once opened? After doing the research, here’s what I uncovered…


Best Method: After opening, canned tuna or salmon will remain fresh in the refrigerator for 1 to 2 days after being refrigerated. Transfer the opened canned fish to a glass container or plastic bag that has been tightly sealed.


After doing more investigation, I discovered additional facts that you should be aware of, so please continue reading…



Is it possible for canned tuna to go bad & How Can You Tell If Tuna in a Can Is Bad?

Even unopened canned tuna may get spoiled, despite the fact that this is a rare occurrence…


When should you toss out your canned tuna cans? When the following situations occur:


  • Damaged, bloated, leaky, rusted, or dented cans are not acceptable.

  • If there is anything incorrect with the can, it should be thrown away. All that happened was that something went wrong during the canning process, most likely. Consider that a stroke of ill-fortune.

  • During opening, the can burst or produced a loud popping sound, indicating that it had exploded.

  • The presence of carbonation in canned tuna indicates that it is unfit for consumption. It’s not a glass of champagne.

  • The tuna has an off-putting or bitter fragrance about it.

  • A foul odor is a solid warning that something is not safe to consume.

  • The color has been altered.

  • Generally speaking, canned tuna is between light brown and light pink in color, with a little reddish tint on occasion. It’s not nice if it’s a dark brown or even black color.

  • Tuna leftovers may be kept in the refrigerator for up to 5 days.

  • If they have been sitting in the refrigerator for so long, they should be thrown out.



If none of the above applies, take a bite of the tuna and determine if it’s safe to consume or not depending on how it tastes to you.


Your taste senses aren’t deceiving you. In most cases, if you have just recently opened the can, the fish will still be good and ready to be used in your tuna salad.

Storage Instructions for Canned Tuna

Keep canned tuna that has not been opened at room temperature and away from heat sources. If there are any leftovers after you’ve opened it, store them in an airtight container in the refrigerator for up to 5 days.


In terms of

, canned goods don’t need much effort — simply place them in a cupboard in the pantry or kitchen and you’re ready to go.


There’s no need for refrigeration or anything like that since the can will ensure that the food is safe to consume…


Although it’s important to note that keeping cans in areas where the temperature surpasses 90°F (or 32°C) or freezing them is not a good idea, it’s not impossible.


The seals can be compromised in any case, and you know how that ends. For your information, most of us forget to wash the cans before opening them.


By doing so, you are preventing any germs on the can from infecting the meal you are preparing. This is particularly critical if you plan on storing the tuna for a few days or longer. Save any leftovers in a sealed plastic jar and place it in the refrigerator for later use.



Checking your canned tuna for signs of spoilage (4 most common signs)

1. There is a distinct fishy odor


Although it’s no secret that fish doesn’t always smell the nicest, the fact that it’s been sitting in a can for who knows how long is even more concerning.


One of the quickest and most accurate methods to determine if your fish is rotten is to brace yourself and open the can. You may notice an intense fragrance of fish, oil, and salt once you’ve opened the container.


If you consume canned tuna on a daily basis, you should be familiar with the scent that we’re speaking about. If, on the other hand, you open the can and the fragrance is different, you may have a can of spoiled tuna on your hands.


The fragrance we’re referring about is one that is acidic in nature. If the tuna fish has gone bad, the can will not smell like typical tuna fish, but rather like something off.


If you detect a strong odor like this, you should probably take care and throw the can away immediately…


Use soap and water to thoroughly wash your hands, and disinfect any areas where the tuna brine may have spilled while you were opening the can. This will guarantee that there are no rotten fish in your immediate vicinity.


2. Take a look at the can


The most straightforward approach to determine whether or not your canned tuna is still good is to check the expiry date on the can.


The longer the expiration date has gone, the greater the likelihood that your tuna fish will be spoiled. You avoid your tuna from going bad, be sure to consume it before the expiration date has been reached.


Some individuals may not want to open a can of tuna fish that has been contaminated. We strongly advise against allowing things to get to this stage if you are very concerned about it.

Whether, on the other hand, you’ve discovered a can that you’d forgotten about and want to know if it’s still good, you should first look at the expiration date.


Please note that if the date has past and you are already concerned about the quality of tuna contained inside the can, you should refer to the remainder of the advice below to determine whether or not you should discard the can or if the tuna is still edible.


3. Metal that has corroded


In this case, the canned tuna will be kept in a metal can. Despite the fact that metal is a reasonably robust and durable substance, it is not indestructible.


It is possible for metal to rust and get rusted if it is not properly kept, which might cause your tuna to go bad sooner than it should.

Rust and corrosion may cause microscopic holes to appear in a metal container, which might interfere with the preservation process.


Moisture and air will be able to enter the can and have an impact on the quality of the tuna fish within. Alternatively, if there are any indications of corrosion or rust on your can, you should probably toss it away.


4. The color of the garment


Normally, when the tuna fish is new out of the can, it has a pinkish, light brown appearance. By inspecting the color of your canned tuna before you eat it, you can be sure that your meal is still safe to consume.


If there are any patches of discoloration on your tuna, however, do not consume it. These might be a dark brown, green, or even black color.


Tuna that has discolored is undoubtedly unsafe to consume, and you should avoid it at all costs. Take extra precautions if you’re not familiar with canned tuna or don’t know what color the tuna should be in order to avoid contamination.

Check your canned tuna using the various methods we’ve discussed to check whether it seems to be spoiled. If you’re concerned about the suspicious hue of the tuna fish and the can is exhibiting additional indications of deterioration, toss the tuna fish away.



Keeping canned tuna in the appropriate condition

Avoid exposing your canned tuna to direct sunlight or high temperatures in order to keep it fresh. Your tuna would be best stored in a kitchen closet or pantry, if possible.


Make certain that the cans are kept in a safe location where they will not fall and get contaminated. Maintain the dryness of the cans as well in order to prevent corrosion from developing on the cans.


Keep them someplace you will not forget about them as well, as recommended by the experts. Unless you consume them before the expiry date, you won’t have to worry about whether or not the meat is still edible.


We understand how tempting it might be to take advantage of a good offer at the grocery store on a large quantity of tuna at a cheap price per can. What’s the harm in storing up on essentials?

You inquire before bringing them home and promptly forgetting about them practically immediately. Only keep as much tuna as you will use in order to avoid running out of food before the expiry date.


While stockpiling canned foods may seem like a smart idea in principle, it is possible that you could wind up squandering all of your money for nothing.


FYI: As soon as you have opened a can of tuna fish, you should take the remaining tuna from the can and put it in a large mixing bowl.


Wrap the bowl tightly in plastic wrap and place it in the refrigerator for later use. It is only recommended to keep canned tuna in the refrigerator for up to 24 hours.


Any longer than necessary may result in the food being spoiled before you get a chance to consume it all…


Some individuals prefer to err on the side of caution and toss away any tuna that isn’t going to be consumed immediately. It’s entirely up to you whether or not you want to put it to use the next day.



Related Questions:

1. How long does canned tuna keep fresh in the refrigerator?


After opening, the product will remain fresh in the refrigerator for 1 to 2 days. Transfer the opened canned fish to a glass container or plastic bag that has been tightly sealed.


2. Is it possible to freeze tuna in a can once it has been opened?


If you want to prolong the shelf life of opened canned tuna even further, you may freeze it. To freeze canned tuna, put it in closed airtight containers or heavy-duty freezer bags and freeze for several hours. What is the shelf life of canned tuna in the freezer? When properly kept, it will retain its finest quality for around 3 months but will stay safe for an extended period of time after that.


3. Does canned tuna go bad when exposed to high temperatures?


When canned tuna is maintained correctly, it has a lengthy shelf life of many years. Excessive heat has been shown to significantly reduce the shelf life of canned tuna. The tuna that has been exposed to high temperatures, even if it has been canned, might rot and become unfit for human consumption.


4. Do you have any unopened canned tuna in the fridge?


The restrictions that apply to tuna cans that have not been opened do not apply to tuna cans that have been opened. It is imperative that you store tuna in the refrigerator after the can has been opened. FYI: It’s recommend that you put your fish in a plastic bag or container before storing it in the refrigerator, where it will remain fresh for one to two days at room temperature.



Final Thoughts

So, class, what did we learn? We now know that canned tuna or salmon will stay fresh in the fridge for 1–2 days after opening. Transfer the opened canned fish to a glass container or a plastic bag.


Keep unopened tuna cans at room temperature and away from heat sources. If you have any leftovers, refrigerate them in an airtight container for up to 5 days.


To store canned foods, just put them in a pantry or kitchen closet. There’s no need for refrigeration since the can ensures the food is safe to eat. Although storing cans in regions where temperatures exceed 90°F (32°C) or freezing them is not recommended, it is doable.


The seals may be compromised in any scenario. For your knowledge, most of us open cans without washing them. Enjoy the rest of your day, always stay safe, and treat others with kindness and respect. Until next time!

How Long Is Canned Tuna Good For Once Opened? (complete guide)