Fresh vs. Frozen Seafood
I’m going to hit you with the truth right out of the gate: a lot of the “fresh” seafood you have been buying was previously frozen. And that’s a good thing.
If you look closely at the fish in your seafood counter, you’ll usually notice a line in a tiny, tiny font that reads, “previously frozen.” Most of the seafood that you see in a “fresh” fish case has been thawed.
(Obviously, there are exceptions to this. If you live in Hawaii or São Miguel, you can bet the tuna hitting the auction is actually fresh, dropped right at the docks from the boat. This post is not referring to the markets in fishing regions that sell local catch. This post is talking about everywhere else — the fish markets in New York City selling tuna from Japan and the grocery stores in middle America. So before you leave a comment saying “but at myyyyyyy fish market!” — I know. If you’re lucky enough to live in a region that has access to that, congratulations. This post is probably not for you.)
Now that my disclaimer is out of the way, back to business.
Yes, most seafood has been previously frozen.
This is not a scandal. It is just how the modern seafood supply chain actually works. And it’s actually a really good thing for food safety and quality.
In most cases, especially for the average North American consumer, you’re going to be better off buying the frozen salmon filets than the fresh salmon filets.
More often than not, frozen seafood is actually fresher than fresh.
Let me explain.
“Fresh” is a marketing word, not a quality guarantee
In the seafood world, “fresh” technically just means “never frozen.” It does not have anything to do with time since the fish has been caught. It does not mean local. It does not mean better.
“Fresh” can be:
Caught yesterday and at your local counter today
Caught five days ago, iced, trucked, flown, and held in distribution before reaching you
Caught and held on ice on a boat for over a week before being landed
Meanwhile, modern frozen seafood is often flash-frozen at −40°F within hours of being caught — locking in quality at peak condition.
Why frozen is often the smarter buy
If you live near a working dock or a great seafood market in a coastal city, fresh can absolutely be the right call. Day-boat fish, just-landed shellfish — there is nothing like it in the world.
If you live anywhere else, frozen is often the better option.
A few reasons:
Freshness is captured at peak. A frozen-at-sea (FAS) fillet was at its best on the day it was frozen. A “fresh” fillet has been quietly aging since the moment it was caught.
Seasonality and access expand. Most of the world’s wild fisheries are seasonal by design. Wild Alaska salmon is only landed for a few months each summer; Maine scallops have a season; spot prawns are a blink-and-you-miss-it window in the spring. Without freezing, you either eat them in those few weeks or you don’t eat them at all. Frozen technology is the only reason you can put wild salmon on a Tuesday in February.
Less waste, more flexibility. You can defrost what you need, when you need it, instead of racing the clock on a fresh fillet that needs to be cooked tonight.
A bigger seafood world is on your plate. Frozen is also the reason a chef in Toronto can work with the same Hokkaido scallop a chef in Tokyo can. It’s the reason wild Patagonian toothfish, Alaskan black cod, and Faroese halibut all reach kitchens that aren’t anywhere near those waters. The world’s most exciting seafood comes from a small handful of regions — frozen technology is what lets the rest of us actually enjoy it.
A note on raw fish: frozen is the rule, not the exception.
If you’ve ever ordered sushi, sashimi, ceviche, crudo, or poke in the United States, the fish on your plate has very likely been frozen at some point — and that’s because the FDA requires it.
The FDA’s Fish and Fishery Products Hazards and Controls Guidance specifies that fish served raw or undercooked must be frozen for parasite destruction using one of three time-temperature combinations: at −4°F (−20°C) or below for at least 7 days, OR at −31°F (−35°C) until solid and held at −31°F for at least 15 hours, OR at −31°F until solid and held at −4°F for at least 24 hours. [2]
There are exceptions. Tuna of the genus Thunnus — including yellowfin, bigeye, albacore, and bluefin — are exempt from the freezing requirement, because the parasites of concern in those species don’t infect humans. Molluscan shellfish and certain aquacultured fish are also exempt.
Learn more about how to handle raw fish here.
How freezing technology actually works now
Today’s commercial freezing is not your freezer at home. It is:
Blast freezing, which drops fish to extremely cold temperatures (typically −30°F to −40°F or colder) very quickly, forming microscopic ice crystals that do not damage the cellular structure of the flesh.
Frozen at sea (FAS), which means fish are flash-frozen on the boat, sometimes within minutes of being landed. By the time it reaches a consumer, the supply chain time on it is essentially zero.
Vacuum-sealed cold chains, which protect texture, color, and flavor from the moment of freezing all the way to your kitchen.
That is a different universe from a fillet that has been “fresh” on ice for five days while it travels through wholesale, distribution, and retail.
The catch (so to speak)
Frozen is not automatically better. Like everything in seafood, the details matter.
The best frozen seafood is:
Frozen at sea or shortly after harvest
Vacuum-sealed and properly packaged
Stored at consistent, very cold temperatures
Thawed slowly and correctly (in the fridge, not on the counter)
The worst frozen seafood has been thawed and refrozen multiple times along the way, which kills texture and flavor. It is one of the few real reasons to be cautious — and a good reason to buy from brands and retailers who can tell you exactly where their seafood comes from.
If you live near a great fresh source, use it. If you do not, buy frozen with confidence and stop assuming that “fresh” automatically wins. In a globalized seafood supply chain, the freshest thing on a counter is often the thing that was frozen first.
Frozen seafood is not a downgrade. It’s innovation and technology working in your favour. It’s the only reason we can enjoy bluefin tuna from Japan in a restaurant in New York City.
