Stockfish is graded by a person. Not by a machine, not by a weight sorter, but by a vraker — a qualified sorter who handles every fish and assigns it to a commercial class on the basis of appearance, colour, aroma, damage and how well it dried.
That is unusual in modern seafood, and it is why the vocabulary is so specific.
How the product is made
Cod is caught, split or left whole, and hung on wooden racks in the open air from roughly February. It dries through the spring in cold air rather than heat — the combination of low temperature, wind and low humidity along the northern Norwegian coast is what makes the process work, and it is why the product exists there and not elsewhere.
The fish comes down in early summer, is matured indoors, and is then graded.
The class names
The commercial classes carry names inherited from the Hanseatic trade routes that carried the product south and east for centuries. Bremer refers to the Bremen trade. Hollender refers to the Dutch market. Ragno and Westre head the traditional ladder and each have their own sub-divisions — Westre Ancona and Westre Piccolo among them.
More than twenty classes are in use across the trade. Ragno sits at the prime end. Different destination markets have settled on different parts of the ladder over generations: Italian buyers and West African buyers are not competing for the same classes, which is one reason the trade works.
Length bands
Alongside the class, stockfish is sorted by length:
| Band |
|---|
| 30/40 cm |
| 40/50 cm |
| 50/60 cm |
| 60/80 cm |
Class first, then length. A class name without a length band leaves the piece size open.
What the sorter is assessing
- Appearance and colour — the visible result of how the drying went.
- Aroma — a clean dried-fish smell. Off-odour is a class-determining defect, not a tolerance.
- Damage — breakage, tears, bird damage. Each class carries its own tolerance.
- Drying result — how evenly and completely the fish dried, which shows up later as moisture content.
Why “premium” is not a grade
The trade already has a precise, centuries-old vocabulary for stockfish quality, applied by hand, fish by fish. Substituting a marketing adjective for a class name removes information from the contract and leaves both parties guessing.
If an offer describes stockfish only as premium, high grade or best quality, ask for the class. If the class cannot be named, the fish has not been graded to the standard the trade expects.
Moisture and rehydration yield
Stockfish is bought dry and used wet. Moisture content at delivery determines how much finished product a kilogram becomes after rehydration. If your costing depends on yield — and in foodservice it usually does — ask for the moisture figure for the lot and agree how yield will be measured.
Storage
Humidity matters more than temperature. Store dry, cool and well ventilated, and manage against mould and infestation through controlled conditions and inspection rather than after the fact.
A complete line
Norwegian stockfish, Gadus morhua, air dried unsalted, class [name and sub-class], length band 50/60 cm, drying origin and drying season to be stated, moisture content to be stated, packed in 45–50 kg bales.