A practical guide to spotting top-quality frozen fish and seafood — glazing, IQF freezing, colour, smell and origin. Know-how for food service and retail buyers.
Frozen fish and seafood can match fresh in quality — provided it was caught, frozen and stored correctly. For restaurants, wholesalers and shops that is the difference between a product that delights the customer and one that comes back as a complaint. Here is what to look for when buying frozen fish.
Freezing method: why IQF matters
The highest quality comes from IQF (Individually Quick Frozen) — flash-freezing single pieces at very low temperatures. This forms tiny ice crystals that do not rupture the muscle structure. Once thawed, the fish stays firm, juicy and full of natural flavour instead of falling apart and leaking water.
What to check
- Glazing — a thin ice layer protects the fish from drying out and oxidation. It should be even, with the glaze percentage (net weight) clearly stated.
- Colour and surface — no yellow discolouration, no freezer burn, no thick uneven ice crust.
- Smell after thawing — clean and sea-fresh; never sharp or ammonia-like.
- Cold chain — a constant -18°C or lower, with no signs of refreezing.
- Origin and certificates — a known fishing ground, batch traceability and sustainable-catch certificates.
Origin is everything
Quality begins at the fishing ground. Atlantic cod from the cold waters of Norway, Pacific pollock or Atlantic halibut each have a different profile, but they share one thing: the best come from clean, well-managed grounds. That is why Nova Seafood works directly with trusted suppliers across five continents and controls the product at every stage — from catch to delivery.
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