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How to Identify Good Salted Hilsa: Common Market Myths and the Facts
❓ Does more salt mean better salted hilsa?
❓ What should the color of salted hilsa look like?
❓ Is very hard salted hilsa always better?
❓ Does a strong smell mean the fish is spoiled?
❓ Is salted hilsa safe if it has been stored for a long time?
❓ Why does salted hilsa vary so much from one shop to another?
❓ How can you tell whether chemicals or unauthorized colors have been used?
❓ What should you check before buying good salted hilsa?
First, one important point: the color, smell, and texture of salted hilsa can help you make an initial quality assessment, but appearance alone cannot confirm that the fish is completely free from harmful microorganisms or chemicals.
Some problems are visible. Others, such as formalin, unauthorized dyes, certain microorganisms, or other chemicals, can only be confirmed through laboratory testing.
How Is Salted Hilsa Made?
In Bangladesh, salted hilsa is mainly prepared in two ways.
Dry Salting
The hilsa is cleaned and the internal organs are removed. Crosswise cuts are made on the body of the fish.
Salt is then applied inside the cuts, the belly cavity, the gill area, and other parts of the fish.
The fish is arranged in a way that allows the liquid released from it to drain away.
Wet Salting or Brining
In this method, the fish is kept in concentrated saltwater.
Sometimes dry salt is applied first, and the fish is later submerged in brine.
The desired taste of salted hilsa does not develop immediately after salting.
Salt gradually enters the fish, water comes out, and changes occur in the fish proteins and fats. These changes create the distinctive aroma, taste, and texture of salted hilsa.
Research has found that salted hilsa may generally take around 7 to 15 days to mature. However, the exact time may vary depending on fish size, cut thickness, salt level, and temperature.
Which Season Produces Better Salted Hilsa?
Salted hilsa is usually prepared in larger quantities when hilsa catches are high in Bangladesh.
Production may be higher from June to September.
However, it is not correct to say that salted hilsa from one specific month is always the best.
The taste and fat content of hilsa depend on several factors, including:
• Fish size and age
• Whether the fish is male or female
• Whether the fish is carrying eggs
• Whether it was caught in a river or coastal or marine area
• How quickly it was processed after being caught
• Whether it was properly kept on ice
• How fresh it was at the time of salting
Therefore, salted hilsa should not be selected only on the basis of season.
The initial freshness of the fish, hygienic processing, and proper storage are more important.
Does More Salt Mean Better Salted Hilsa?
No.
Salt reduces the available water inside the fish. As a result, the growth of many spoilage and harmful microorganisms slows down.
This is why salt has been used for fish preservation for a long time.
However, more salt does not automatically mean better quality.
Excess salt may:
• Make the fish unusually hard
• Hide the natural taste of hilsa
• Cause excessive changes in fish proteins
• Increase oxidation of fish fat and create a stale or rancid-oil smell
• Be used to mask unpleasant odors from poor-quality raw fish
Salt may slow microbial growth, but it cannot fully correct problems caused by dirty surroundings, poor-quality fish, contaminated water, or improper temperature.
Research on salted hilsa from markets has found noticeable bacterial loads in some samples even after salting.
Therefore, the idea that “the saltiest fish is the safest fish” is incorrect.
What Should You Use to Judge Quality?
Check whether salt appears to have entered the different parts of the fish evenly.
What Should You Not Use to Judge Quality?
Do not taste one piece and decide that the fish must be good simply because it is extremely salty.
What Color Should Salted Hilsa Be?
There is no single fixed color for salted hilsa.
The color may vary depending on the fat content, age of the fish, salt level, processing method, use of turmeric, and storage period.
Acceptable salted hilsa may appear:
• Light yellow
• Yellowish-brown
• Slightly darker along the back
• Yellowish around the belly
In some regions of Bangladesh, a small amount of turmeric powder is traditionally used during preparation.
Therefore, a yellow color does not automatically mean that chemicals were used.
At the same time, an unusually bright yellow color should not be considered proof of good quality.
Be Cautious If You Notice:
• Unusually bright pink or red patches
• Small dark spots that look like sprinkled black pepper
• Green, black, or cotton-like mold
• One side being very dark brown while another side looks unusually pale
• Dark yellow-brown discoloration in the fatty parts, similar to old oil
Pink or reddish discoloration may sometimes be related to salt-tolerant bacteria.
Black pepper-like spots may indicate mold-related spoilage.
Excessive brown or yellow-brown discoloration may also be a sign that the fish fat has become rancid.
Remember, color alone cannot confirm the safety of the fish.
What Should Salted Hilsa Smell Like?
Properly matured salted hilsa may naturally have:
• A distinctive salty fish aroma
• A mild fermented or matured smell
• The strong natural aroma of hilsa fat
Therefore, if you expect it to smell exactly like fresh hilsa, you may wrongly assume that good salted hilsa is spoiled.
However, the normal aroma of salted hilsa is different from a rotten smell.
Do Not Buy Fish That Smells Like:
• Strong ammonia
• Rotten food or sewage
• Excessively sour material
• Rotten eggs or sulfur
• Old oil, varnish, or paint
• An unpleasant odor that becomes even stronger during cooking
A common consumer mistake is believing that “salted fish is supposed to smell bad.”
Because of this belief, some people ignore genuinely rotten or rancid odors.
A distinctive salted aroma may be normal. An offensive rotten smell is not.
Is Very Hard Salted Hilsa Better?
Salted hilsa is naturally firmer than fresh hilsa.
Salt removes water from the fish and changes the structure of its proteins. This makes the flesh firmer.
However, fish that feels as hard as a stone is not automatically better.
Dry-salted fish may be firmer.
Wet-salted fish may remain slightly softer.
Therefore, hardness alone cannot be used to judge quality or safety.
Signs of Good Texture:
• The flesh is firm and holds together
• It does not turn into a paste when pressed
• It is not unusually slimy
• The cut sections do not fall apart
• The outside is not extremely dry while the inside remains under-processed
Signs of Poor Texture:
• Sticky or slimy surface
• Soft or spoiled inside while the outside is hard
• Excessive brittleness or powdery breakdown
• Deep cracks or severe shrinkage
• Flesh separating unusually easily from the bones
If fish is dried at an excessively high temperature, the outside may harden while the inside fails to dry properly.
Therefore, the idea that “the harder the outside, the better the fish” is not scientifically correct.
Is Salted Hilsa Safe After Long Storage?
There is no single storage period that applies to every salted hilsa product.
Its shelf life depends on:
• How fresh the fish was before salting
• How much salt was used
• Whether dry or wet salting was used
• The size of the fish and thickness of the cuts
• How much moisture was removed
• The storage temperature
• Whether the package was airtight
• How long it remained in warm conditions before sale
• Whether clean salt and safe water were used
Some controlled studies have found acceptable quality in salted hilsa after several weeks of storage.
Other market-based studies have reported signs of rancidity in some fish after around one to one and a half months at room temperature.
However, results from specific research samples cannot guarantee the safety of every open-market product.
For Packaged Salted Hilsa, Check:
• Production date
• Expiry date
• Storage instructions
• Whether the package is intact
• Manufacturer information
• Batch number
For Open-Market Salted Hilsa, Ask:
• When it was prepared
• How it was stored
• How old it is
If the seller cannot provide reliable information, buy a small quantity and use it soon.
How Should Salted Hilsa Be Stored in the Refrigerator?
Salted hilsa is often sold at room temperature in Bangladeshi markets.
However, the fact that it is traditionally displayed this way does not mean it is the safest method.
After bringing it home, it is better to keep it cold as soon as possible.
Refrigeration Guidelines:
Do not place it uncovered in the refrigerator.
Divide it into small portions based on how much you will cook at one time.
Use clean, dry, airtight containers or food-grade bags.
Keep raw salted fish separate from cooked food.
Store it on the lower shelf or in a separate tray so that any liquid cannot drip onto other foods.
For longer storage, freeze it in small portions.
Do not repeatedly thaw and refreeze it.
For packaged products, follow the manufacturer’s storage instructions.
No universally accepted home freezer storage period for salted hilsa was found.
Therefore, the idea that it can be kept indefinitely simply because it is frozen is incorrect.
What Should You Do Before Cooking?
First inspect both sides of the fish, the cuts, the belly area, and the fatty sections.
• Do not use it if mold or unusual patches are present
• Rinse it with clean and safe water
• If it is too salty, soak it briefly in cold water
• Change the soaking water once or twice if necessary
• Do not leave it soaking at room temperature for a long time
• Do not use the soaking water for cooking
• Wash your hands, knife, bowl, and cutting board after handling the fish
• Cook the fish thoroughly
If you have a food thermometer, the internal temperature should reach approximately 63°C.
Without a thermometer, check whether the flesh has become opaque and separates easily.
However, do not assume that rotten, moldy, or suspicious fish can be made safe simply by washing or cooking it for longer.
Why Does Salted Hilsa Differ So Much Between Shops?
Not every shop sells fish prepared using the same method.
Differences may result from:
• Initial freshness of the raw fish
• Fish size and fat content
• Whether the fish contains eggs
• Thickness of the cuts
• Dry or wet salting
• Amount and quality of salt
• Maturation period
• Storage temperature
• Quality of the water used
• Drying method
• Packaging
• Transportation
• How long the fish has remained in the shop
Studies of salted hilsa from different markets in Bangladesh have found variations in salt, moisture, fat, and bacterial levels.
Therefore, do not judge only by price or shop popularity. Examine the actual condition of the fish.
How Can You Tell Whether Chemicals Were Used?
The direct answer is: you cannot confirm this using only your eyes, nose, or hands.
Formalin, unauthorized colors, antibiotics, and other chemicals require laboratory testing.
Possible Reasons for Suspicion Include:
• Unusually bright or artificial-looking color
• No visible change despite prolonged open display
• A complete absence of the natural fish aroma
• Uneven or inconsistent color in different parts of the same fish
• Packaged fish with no producer name, date, or batch number
• A seller who cannot explain the source or processing method
However, these are only reasons for suspicion. They are not proof that chemicals were used.
Common informal methods such as checking whether flies sit on the fish, whether the eyes look clear, whether the surface is shiny, or whether there is little smell cannot confirm chemical use.
Common Market Myths and the Facts
Myth 1: The Saltier the Fish, the Safer It Is
Fact: The correct amount of salt supports preservation. Excess salt cannot correct poor-quality raw fish, contaminated water, or improper storage.
Myth 2: Yellow Color Always Means Chemicals
Fact: Turmeric is used in some areas, and salted hilsa may also naturally become yellowish. However, unusually bright color should raise caution.
Myth 3: The Harder the Fish, the Better and Older It Is
Fact: Hardness may reflect the processing method. It does not guarantee safety or quality.
Myth 4: Salted Fish Never Spoils
Fact: Salted fish can still develop bacteria, salt-tolerant microorganisms, mold, and rancid fat.
Myth 5: The Stronger the Smell, the Better the Taste
Fact: A matured aroma may be normal. Ammonia, rotten, overly sour, or old-oil smells are not normal.
Myth 6: Spoiled Fish Can Be Made Safe With More Salt
Fact: Salt cannot fully reverse spoilage or poor initial quality. The freshness of the raw fish is extremely important.
Myth 7: If It Looks Good, It Must Be Germ-Free
Fact: Harmful microorganisms and chemicals do not always create visible changes.
Common Mistakes People Make
• Buying only on the basis of color
• Not asking when the fish was prepared
• Failing to inspect inside the cuts
• Looking only at the back and ignoring the belly area
• Mistaking small mold spots for salt crystals
• Keeping open fish in the same plastic bag for a long time
• Storing raw fish next to cooked food
• Repeatedly thawing and refreezing
• Treating a rotten odor as the normal smell of salted fish
• Cooking suspicious fish with heavy spices instead of discarding it
Checklist for Buying Good Salted Hilsa
Before buying, ask yourself:
☐ Is the source or place of production known?
☐ Can the seller explain whether it is dry-salted or wet-salted?
☐ Does the color look natural and reasonably even?
☐ Are there any unusual pink, red, green, or black patches?
☐ Are there any black pepper-like spots?
☐ Is the smell salty and characteristic rather than rotten or ammonia-like?
☐ Is the flesh firm without being slimy or mushy?
☐ Are there any soft, dark, or spoiled areas inside the cuts?
☐ Is the fish free from dirt, sand, insects, and contaminated liquid?
☐ If packaged, is the package intact and properly dated?
☐ Can you keep it cold soon after purchase?
10 Golden Tips for Buying Good Salted Hilsa
Examine the Overall Condition, Not Just the Color
Natural yellowish or light brown shades may be normal.
Avoid unusual pink, red, green, or moldy areas.
Inspect the Inside of the Cuts
The outside may look good while the inside is soft or spoiled.
Check the Smell
A salty and matured aroma may be acceptable.
Ammonia, rotten, sour, or old-oil smells are not acceptable.
Do Not Assume the Saltiest Fish Is the Best
Even salt penetration is more important than extreme saltiness.
Do Not Be Impressed by Stone-Like Hardness
Firmness is acceptable.
Excessive dryness, cracking, or brittleness is not proof of high quality.
Choose a Clean Shop
Do not buy fish displayed on dirty floors or exposed to dust, direct sun, insects, or contaminated water.
Ask About Age and Storage History
Check whether the seller can explain approximately when and how the fish was prepared.
Buy Small Quantities of Open Products
It is better to buy less and use it quickly.
Refrigerate Soon After Purchase
Do not leave it at room temperature for days simply because it is salted.
When in Doubt, Do Not Buy
The safety of your family is more important than the price of one fish.
Final Note
Good salted hilsa is not defined only by more salt, greater hardness, or a stronger smell.
Good quality results from fresh raw fish, clean salt and water, proper maturation, hygienic processing, and correct temperature-controlled storage.
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SHORT VERSION
How to Identify Good Salted Hilsa
More salt, greater hardness, or a stronger smell does not automatically mean better salted hilsa.
Good salted hilsa should generally be firm, but it should not be slimy, mushy, or excessively brittle.
Its color may be light yellow, yellowish-brown, or slightly darker along the back.
However, avoid fish with bright pink or red patches, green or black mold, or small black pepper-like spots.
Salted hilsa may have a distinctive salty and matured aroma.
However, ammonia, rotten, strongly sour, rotten-egg, or old-oil smells are not normal.
Salt reduces available moisture and slows microbial growth, but it does not make the fish completely germ-free.
Too much salt may make the fish unusually hard and hide the natural flavor of hilsa.
Before buying, inspect the cuts, belly area, smell, cleanliness, and storage conditions.
Ask when it was prepared, whether it was dry-salted or wet-salted, and how it was stored.
After purchase, divide it into portions and keep it in an airtight container in the refrigerator.
Most importantly, formalin or unauthorized colors cannot be confirmed by appearance alone. Laboratory testing is required.
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CAROUSEL SLIDE VERSION
SLIDE 1
How to Identify Good Salted Hilsa
Common Market Myths and Scientific Facts
SLIDE 2
How Is Salted Hilsa Made?
Hilsa is cleaned and salt is applied inside the cuts, belly, and other parts.
Two common methods are used:
Dry Salting:
Liquid released from the fish drains away.
Wet Salting:
The fish is kept in concentrated saltwater.
It takes several days for the desired taste and texture to develop.
SLIDE 3
Does More Salt Mean Better Quality?
No.
Salt slows microbial growth, but it does not make the fish completely germ-free.
Too much salt may:
• Hide the natural taste
• Make the fish excessively hard
• Cause rancid fat odors
Balanced salting is important, not maximum salting.
SLIDE 4
What Should the Color Look Like?
Normal shades may include:
• Light yellow
• Yellowish-brown
• Slightly darker back
• Yellowish belly
Avoid:
• Bright pink or red patches
• Green or black mold
• Black pepper-like spots
• Unusually dark brown fatty areas
SLIDE 5
What Should It Smell Like?
Normal:
• Distinctive salty fish aroma
• Mild matured or fermented smell
Abnormal:
• Ammonia
• Rotten or sewage-like odor
• Strong sour smell
• Rotten-egg odor
• Old-oil smell
SLIDE 6
Is Very Hard Fish Better?
Dry-salted fish may naturally be firmer.
Good fish should:
• Be firm
• Not be slimy
• Not be mushy
• Not be excessively cracked or brittle
Stone-like hardness is not proof of quality.
SLIDE 7
Which Season Is Better?
Salted hilsa may be produced more commonly from June to September.
However, the month is less important than:
• Initial freshness
• Fish size and fat content
• Proper icing
• How quickly it was salted
• Hygiene and storage temperature
SLIDE 8
How Long Does It Last?
There is no single answer.
Shelf life depends on:
• Salt level
• Moisture
• Dry or wet salting
• Temperature
• Packaging
• Initial fish quality
If the history of an open-market product is unknown, buy a small quantity and use it quickly.
SLIDE 9
Refrigeration Rules
• Divide into cooking-size portions
• Use airtight containers
• Keep raw and cooked foods separate
• Refrigerate quickly
• Do not repeatedly thaw and refreeze
• Follow package instructions
SLIDE 10
Can You Detect Chemicals?
Not with certainty by appearance or smell alone.
Formalin, unauthorized colors, and other chemicals require laboratory testing.
Unusual color or smell may raise suspicion, but it is not proof.
SLIDE 11
Five Common Market Myths
❌ The saltier, the safer
❌ The harder, the better
❌ Salted fish never spoils
❌ Yellow always means chemicals
❌ Rotten smell is normal in salted fish
SLIDE 12
10 Golden Buying Tips
Inspect inside the cuts
Check the smell
Avoid unusual patches
Do not judge only by saltiness
Avoid slimy fish
Choose a clean shop
Ask when it was prepared
Buy small amounts of open products
Refrigerate quickly
When in doubt, do not buy
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SOURCE LIST
FAO/WHO Codex
Code of Practice for Fish and Fishery Products
Topics:
Salted fish processing, salt quality, mold, pink spoilage, temperature, and maturation.
Link:
https://www.fao.org/4/a1553e/a1553e00.pdf
Temporal Variation in Quality Characteristics During Dry Salt-Fermentation of Hilsa
Topics:
Maturation, nutritional changes, oxidation, and bacterial communities in salted hilsa from Bangladesh.
Link:
https://link.springer.com/article/10.1186/s43014-023-00213-5
Optimizing Chunk Thickness for Dry-Salted Hilsa
Topics:
Cut thickness, salt penetration, texture, microorganisms, and consumer acceptability.
Link:
https://onlinelibrary.wiley.com/doi/10.1155/jfpp/6772118
Nutrition and Quality Status of Dry-Salted Hilsa in the Retail Market of Bangladesh
Topics:
Color, smell, texture, salt, oxidation, and microbiological quality of market samples.
Microbial and Proximate Composition of Fresh and Salted Hilsa
Publication:
Bangladesh Journal of Zoology
Topics:
Bacterial and nutritional composition of salted hilsa from different markets in Dhaka.
Link:
https://www.banglajol.info/index.php/BJZ/article/view/23365/16060
Assessment of Shelf Life and Quality of Market and Laboratory-Prepared Salted Hilsa
Topics:
Comparison of salt, TVB-N, and bacterial load in laboratory-prepared and market samples.
Link:
https://pdfs.semanticscholar.org/b87f/cffb753d3436365b1cb8046d26def0205155.pdf
Supply Chain Analysis of Salted Tenualosa ilisha in Bangladesh
Topics:
Dry and wet salting methods and the salted hilsa supply chain in Bangladesh.
Bangladesh Food Safety Authority
Topics:
Safe food storage and testing of fish for formalin, color, and other chemicals.
Link:
https://bfsa.gov.bd/
Testing Requirements:
https://labrepository.bfsa.gov.bd/testing-requirement
US Food and Drug Administration
Selecting and Serving Fresh and Frozen Seafood Safely
Topics:
Abnormal fish odors, storage, cross-contamination, and safe cooking temperatures.
FAO
Sensory Assessment of Fish Quality
Topics:
Fish quality assessment through color, smell, taste, and texture.