How to store fish in the refrigerator so that there is no smell: complete guide

Fresh fish is a valuable source of protein and omega-3 acids, but improper storage can turn it into a source of persistent unpleasant odor that will remain in the refrigerator for a long time. Even the highest quality fish begins to deteriorate after just a few hours at room temperature, and in the refrigerator the process of fat oxidation and bacterial growth only slows down, but does not stop. The main problem is trimethylamine, the substance responsible for the characteristic "fishy" odor, which is easily absorbed into plastic and other products.

In this article you will find not only basic recommendations for temperature and packaging, but also unique techniques of professional chefs and food industry technologistswhich are used in restaurants and fish stores. We will look at why ordinary film often does not prevent odor, how to properly prepare fish before storage, and what mistakes 90% of housewives make without even knowing it. We will pay special attention to the storage of different types of fish - from tender trout to fatty salmon, since there are no universal solutions here.

Why fish starts to smell in the refrigerator: a scientific explanation

The unpleasant smell of fish is the result of the work of two main processes: microbiological decomposition and fat oxidation. At temperatures above +2°C, bacteria (mainly Pseudomonas and Shewanella) actively multiply on the surface of the fish, breaking down proteins into amines, among which the most “fragrant” is trimethylamine. In parallel, fish enzymes (especially in the gills and intestines) continue to work, accelerating spoilage.

Faty varieties of fish (mackerel, herring, salmon) spoil faster due to lipid oxidation, which is accompanied by the appearance rancid smell. At the same time, the refrigerator only slows down these processes, but does not stop them completely. It is important to understand that smell is already last stage of spoilage. At this point, the fish can be hazardous to health due to the accumulation of histamine and other toxins.

• 🦠 Bacterial activity: at +4°C, the rate of bacterial reproduction decreases by 4 times compared to room temperature, but does not stop.
• 🔥 Fat oxidation: in fatty fish the process is more intense, especially when in contact with oxygen.
• 🧊 Ice crystals: when frozen, cell membranes are damaged, accelerating deterioration after thawing.
• 🧪 Enzymes: autolysis (self-destruction of tissues) continues even at 0°C.

Interesting fact: in industrial conditions, to slow down spoilage, fish are processed carbon dioxide (CO₂) in a modified atmosphere. At home, a similar effect can be achieved using vacuum packaging or special containers with oxygen absorbers.

Optimal storage temperature: why +4°C is not enough

Most refrigerators support the temperature in the main chamber is +4...+5°C - this is the standard for most products, but not for fish. Research European Food Safety Agency (EFSA) shows that to prolong the freshness of fish, the optimal storage temperature is from 0°C to +2°C. At this temperature:

• ⏳ The shelf life of fresh fish increases from 1-2 to 3-4 days.
• 🦠 Growth of pathogenic bacteria (for example, Listeria monocytogenes) practically does not happen.
• 🧊 The process of fat oxidation slows down by 40-50%.

How to achieve this temperature in a home refrigerator?

1. Fresh zone (if any): in most modern models (Liebherr, Samsung, Bosch) this compartment with a temperature of about +1°C. Ideal for fish and seafood.
2. Bottom shelf above the vegetable drawer: usually 1-2°C cooler here than on the upper shelves.
3. "Super Cool" mode (if supported): temporarily reduces the temperature to +2°C.

⚠️ Attention: if your refrigerator is not equipped with a freshness zone, do not put fish in door - this is the warmest place (+6...+8°C) due to frequent opening. Also avoid proximity to fruits (they emit ethylene, which accelerates spoilage) and cheeses (they easily absorb odors).

Preparing fish before storage: what to do immediately after purchase

Many people make a critical mistake: they put the fish in the refrigerator directly in the store packaging. Plastic trays and film that are used in supermarkets are not intended for long-term storage - they allow air to pass through and do not protect against contamination by bacteria from the refrigerator. Proper preparation of fish before storage includes 5 mandatory steps:

Remove the entrails (if the fish is not gutted)|Rinse under cold running water|Dry with paper towels|Pack in an airtight container|Place in the coldest zone of the refrigerator-->

1. Gutting and cleaning

If the fish was purchased ungutted, it must be cleaned of entrails within 2 hours after purchase. Gills, intestines and eggs are the main sources of bacteria and enzymes that accelerate spoilage. To do this:

• 🐟 Make a cut from the anus to the head.
• 🪓 Carefully remove the insides without damaging the gall bladder (its contents are bitter).
• 🧼 Rinse the fish cavity under cold water, removing clots blood.

2. Washing and drying

Fish should be washed in running water (not in a basin!) to wash off mucus and bacteria from the surface. Pay special attention to:

• 🐠 Gills —the most microbes accumulate here.
• 🦴 Fins and tail —dirt particles often remain.
• 🩸 Abdominal cavity —if the fish gutted, check for remains of entrails.

After washing the fish you need dry thoroughly with paper towels. A damp surface promotes the growth of bacteria and the formation of ice during freezing.

3. Removing scales (optional)

Scales protect the fish from drying out, but bacteria also accumulate on them. If you plan to store fish for more than 2 days, it is better to remove the scales. To do this:

• 🐟 Place the fish on its side, with the tail facing you.
• 🪚 Use a scraper or the blunt side of a knife to clean the scales from the tail to the head.
• 🧹 Remove any remaining scales with a damp cloth.

⚠️ Attention: Never wash fish in hot water - this denatures the proteins on the surface and speeds up spoilage. Optimal water temperature for washing: +10...+15°C.

The best packaging methods: what really works against odor

Regular cling film or plastic bag is the worst choice for storing fish. They do not provide a seal, allow air to pass through, or protect against odor cross-contamination. Effective alternatives:

1. Vacuum packaging

Removing air from the packaging slows down the oxidation of fats and the growth of aerobic bacteria. Suitable for vacuuming:

• 🔧 Vacuum packer (for example, FoodSaver or Casio): creates a sealed package with a pressure of up to 0.8 atm.
• 🧃 Vacuum containers s with a hand pump: a budget alternative (brands Lock&Lock, Tupperware).
• 💨 "Water vacuum" method: place the fish in a zip bag, lower it into the water, leaving only a corner open - the water will displace the air.

Vacuum-packed fish can be stored 1.5-2 times longer than in regular packaging. For example, salmon will last 5-6 days instead of 2-3.

2. Containers with odor absorbers

Special containers with built-in filters (for example, Systema Klip It Fresh or OXO Good Grips) contain activated carbon or zeolite, which absorb ammonia and trimethylamine. An alternative is to put in a regular container:

• ☕ Ground coffee: 1 teaspoon per 500 g of fish.
• 🍋 Lemon peels: 2-3 pieces (replace every 2 days).
• 🧂 Salt: 1 tbsp to the bottom of the container (absorbs moisture).

3. Parchment paper + foil

This method is used in a professional kitchen for short-term storage (up to 2 days):

1. Wrap the fish in parchment paper (absorbs moisture).
2. Wrap the top with food foil (air protection).
3. Place in a container with a lid.

4. Marinade as a preservative

The acidic environment inhibits the growth of bacteria. For short-term storage (up to 3 days), fish can be placed in a weak marinade:

• 🍋 Lemon juice + water (1:3).
• 🍎 Apple cider vinegar + water (1:5).
• 🧅 Onion infusion: 1 onion per 200 ml of water (leave for 1 hour).

Important: after marinating, the fish must be washed before cooking, if it is not intended for consumption raw (for example, for sushi).

How to store different types fish: fatty, lean, seafood

There are no universal recommendations for storing fish - it all depends on its fat content, size and type. For example, Fatty fish (salmon, mackerel, herring) spoils 2-3 times faster than lean fish (cod, pollock, flounder) due to the high content of unsaturated fatty acids, which quickly oxidize. Below is a table with optimal storage conditions for popular types:

Fatty fish (salmon, mackerel, sable fish) requires special attention:

• 🧊 Temperature: no higher than +1°C.
• ⏳ Term: maximum 2 days, even in a vacuum.
• 🛡️ Protection: double packaging (for example, foil + zip bag).

Lean fish (cod, haddock, flounder) is less capricious, but also requires proper packaging:

• 💧 Humidity: be sure to dry before packaging.
• 🧂 Salt: you can salt the surface for additional protection.
• 🍋 Acid: add a slice of lemon to the container.

Seafood (shrimp, squid, shellfish) spoils faster than fish due to the high content of free amino acids:

• 🦐 Store shrimp in ice water (1:1 ratio) for no more than 2 days.
• 🦑 It is better to freeze squid immediately - when stored in the refrigerator, they become rubbery.
• 🐚 Shellfish (oysters, mussels) are stored alive in a damp cloth at +2...+4°C.

⚠️ Attention: if the fish has been thawed, it cannot be stored in the refrigerator for longer than 12 hours. Re-freezing is strictly prohibited - this leads to the proliferation of Clostridium botulinumbacteria that causes botulism.

What to do if the fish has already begun to smell?

If the fish has acquired an unpleasant odor, but has not yet become covered with mucus and has not changed color, it can be saved:

1. Rinse in cold water with salt (1 tablespoon per 1. l).

2. Soak for 30 minutes in a solution of lemon juice (1:10).

3. Cook immediately - frying or baking with spices (garlic, ginger, curry) will kill the residual smell.

If the fish is sticky, with a gray coating. or an ammonia smell - it must be thrown away.

Top 5 mistakes that cause fish to stink in the refrigerator

Even if you follow all the recommendations, one small mistake can ruin your efforts. Here are the most common mistakes that 9 out of 10 housewives make:

1. Storage in store packaging
   

   Plastic trays from the supermarket are not sealed and allow air to pass through. Moreover, fish particles from previous buyers often remain on them, which speeds up spoilage.

2. Using one container for different types of fish
   

   Fatty fish (for example, mackerel) spoils lean (cod) due to cross-contamination with fats and enzymes. Always store types of fish separately.

3. Storage near dairy products
   

   Lactic bacteria (Lactobacillus) accelerate the spoilage of fish, and the fishy smell is easily absorbed into butter, cheese and yoghurts.

4. Incorrect defrosting
   

   Defrosting at room temperature or in warm water leads to rapid growth of bacteria. Correct: in the refrigerator at +2°C (10-12 hours) or in cold water in a sealed bag (1-2 hours).

5. Ignoring the zone. freshness
   

   If there is a zone with a temperature of +1°C in the refrigerator, but you put the fish on the top shelf (+5°C), the shelf life is reduced by 2 times.

Another common mistake is storing fish in the refrigerator doorHere the temperature fluctuates from +6°C to +10°C due to frequent opening, which creates ideal conditions for the proliferation of Pseudomonas fluorescens bacteria responsible for the putrid odor.

A less obvious, but critical mistake - using detergents to wash fish. dishes or soap leave a film on the surface of the fish, which:

• 🧼 Retains bacteria and accelerates spoilage.
• 👃 Gives the fish a chemical taste.
• 🚫 May cause stomach upset if ingested.

To wash fish, cold running water is enough. If disinfection is needed, use a solution of salt (1 tablespoon per 1 liter) or lemon juice (1:10).

How to remove the smell of fish from the refrigerator: emergency measures

If the smell of fish has already been absorbed into the refrigerator, ordinary cleaning will not be enough. The fishy smell penetrates the plastic, rubber seals and even food. To get rid of it completely, you will need a comprehensive approach:

1. Deep cleaning of the refrigerator

Turn off the refrigerator, remove all food and follow these steps:

1. Remove all shelves and drawers, wash them in warm water with baking soda (2 tablespoons per 1 liter).
2. Wipe the inner walls with the solution vinegar (1:1 with water) or hydrogen peroxide (3%).
3. Treat the rubber seals with a toothbrush soaked in ammonia (1 teaspoon per glass water).
4. Rinse the drainage hole (usually located at the back) with a cotton swab and soda solution.

2.Natural odor absorbers

After cleaning, place one of the following absorbers in the refrigerator:

• ☕ Activated carbon: 10-15 tablets in an open container (change every 2 days).
• 🍋 Citrus zest: peel of 1 orange or lemon (dry and replace once a week).
• 🧂 Salt with iodine: 100 g on a saucer (absorbs ammonia).
• 🌿 Fresh herbs: a bunch of parsley or mint (change every 3 day).

3. Disinfection without chemicals

To remove persistent odors, you can use:

• 🔥 Steam treatment: place a bowl of boiling water in the refrigerator and close the door for 20 minutes. Steam will dissolve fatty deposits.
• ❄️ Freezing: if the smell is absorbed into the plastic, place the removable parts in the freezer for 12 hours - low temperature destroys trimethylamine molecules.
• 💡 UV lamps: some models refrigerators (LG InstaView, Samsung Family Hub) have a built-in UV lamp for disinfection.

4. Prevention of the reappearance of the smell

To prevent the smell of fish from returning:

• 📅 Once a month, wash the refrigerator with a soda solution (even if there is no smell).
• 🧊 Store fish only in airtight containers.
• 🚫 Do not keep the fish for more than 2 days (even if it is “still normal”).
• 🌡️ Check the temperature of the refrigerator with a thermometer (optimally: +2...+4°C).

⚠️ Attention: if after all the procedures the smell remains, check drainage tube (it may be clogged with organic residues). For cleaning, use a thin brush or wire soaked in vinegar.

FAQ: Frequently asked questions about storing fish

Is it possible to store fish in the freezer without packaging?

No, this leads to frostbite (moisture loss) and fat oxidation. Unpackaged fish in the freezer:

• Loses up to 30% of weight due to moisture evaporation ("sublimation drying").
• Covered with an ice crust, which destroys meat cells.
• Absorbs foreign odors from the freezer.

Minimum packaging - 2 layers of cling film. The optimal one is a vacuum or a zip-lock bag from which air has been removed.

How long can you store defrosted fish in the refrigerator?

Thawed fish must be cooked within 12-24 hours. Further storage is dangerous for two reasons:

1. Bacterial growth: when defrosting, bacteria that were in a state of suspended animation are activated on the surface of the fish.
2. Oxidation: cellular cells destroyed during freezing membranes oxidize faster.

Exception: if the fish was defrosted in the refrigerator (at +2°C) and did not have time to heat above +4°C, it can be stored for up to 36 hours.

Why does fish smell of ammonia?

The smell of ammonia is a sign putrefactive decomposition of proteins under the influence of bacteria Proteus i Clostridium. This happens when:

• The fish was stored at temperatures above +4°C.
• The entrails were not removed (especially from uneviscerated fish).
• The fish was caught more than 3 days ago (even if was in the refrigerator).

Such fish should not be consumed - ammonia indicates a high content of histamine and other biogenic amines that can cause food poisoning.

Is it possible to freeze fish again?

Absolutely not. Repeated freezing leads to:

• 🦠 Rapid growth of Listeria monocytogenes - bacteria resistant to low temperatures.
• 💧 Complete loss of texture (the fish becomes “cotton” due to cell destruction).
• 🧪 Education toxins that are not destroyed by heat treatment.

Exception: if the fish was defrosted in the refrigerator and did not have time to heat above +4°C, it can be cooked frozen as a ready-made dish (for example, cutlets or soup).

How to store smoked or salted fish?

Smoked and salted fish are stored for a long time