Fish Preservation: What is the Right Way to Defrost Food?
With the arrival of warmer weather and higher temperatures, it’s important to preserve the quality and safety of food. One topic that often raises doubts is the correct way to defrost fish in order to maintain its properties, flavor, and texture.
Find out if you’re doing it the right way!
What is the safest and best way to defrost fish?
In the refrigerator
Fish should be defrosted in the refrigerator, as this allows it to thaw slowly and evenly, minimizing the risk of bacterial contamination.
To do this, simply place the fish on a plate or suitable container, cover it with plastic wrap, and put it in the fridge. It should remain there for several hours, or even overnight, depending on the size and thickness of the fish. Typically, defrosting takes between 8 and 24 hours. The fish should not stay in the fridge for more than 2 days to avoid spoilage.
However, we know that while this method is ideal, it takes some time and sometimes we need to cook the fish immediately.
Other safe ways to defrost fish
Defrosting fish in cold water
It is possible to defrost fish in water, but it must be done correctly to avoid cross-contamination and maintain the quality of the fish.
How?
- Place the fish in a sealed plastic bag or airtight container.
- Submerge the fish in cold water.
- Change the water every 20–30 minutes.
Defrosting fish in the microwave
If you need an even faster method, you can use the microwave:
- Place the fish on a microwave-safe plate.
- Use the defrost function on your microwave for a few minutes. If your microwave doesn’t have this function, use the lowest power setting.
- Be sure to turn the fish regularly to ensure even defrosting.
Common mistakes to avoid
Defrosting fish at room temperature:
This can cause uneven thawing, loss of quality, and allow microbial growth.
Cooking fish before it is fully defrosted:
Fish needs to be completely thawed to achieve the desired texture when cooked.
Defrosting fish in the microwave at high power:
This can result in uneven cooking and loss of quality.
Additional tip
When shopping, always bring a sealed bag and an ice pack to keep the fish cold and prevent it from thawing during transport. Never refreeze fish that has already been defrosted, as this can affect the product’s quality and increase the risk of bacterial growth.



