Tinned or Fresh? When the Tin Is the Better Fish, and the Honest
The word fresh does a great deal of work at a fish counter a thousand miles from any coast. A sardine in a Denver display case has been dead for three to seven days: caught off Portugal or California, iced, flown or trucked, held at a distributor, held at the store. It may be perfectly good. But a sardine that went from the boat to a cannery on the same coast and into a tin within a day of landing was preserved at a point that fish never reached, and for oily fish that difference is the whole argument. This page draws the line honestly. The tin wins more often than most people expect, fresh wins in cases the tin's partisans do not like to admit, and a landlocked kitchen should divide its money between them on purpose. Our conservas piece covers what a good tin is; this is the tin against the counter.
The freshness arithmetic
| A conserva sardine | A "fresh" sardine in Denver | |
|---|---|---|
| Where landed | Portuguese or Galician coast | Portuguese, Californian or Pacific coast |
| Hours from net to preservation | Six to twenty-four, at a cannery on the same coast | Not preserved; iced |
| Days from net to your kitchen | The fish is frozen in time at hour twenty-four; the tin arrives months later, aged and improved | Three to seven, on ice, through two or three hands |
| Condition on arrival | As it was the day after the catch, plus the mellowing of the oil | Somewhere on the decline from peak; oily fish decline fastest |
| Waste | None; the tin keeps for years | The counter discards what does not sell; the kitchen discards what it did not cook in time |
| Price per edible ounce | Comparable to or below counter price for the same species, once waste and yield are counted | Includes air freight, ice, spoilage, and the whole fish's bones and head |
Oily fish are the point. Sardines, mackerel, anchovies and herring carry their fat in the flesh, and fat oxidizes; they are at their best the day they are caught and noticeably worse by the third. A cannery captures them at the peak, and the sealed tin, with no oxygen, holds them there while the olive oil slowly improves them, as the cannery piece describes. A lean fish, cod, halibut, sole, declines more slowly and freezes well, and for those the tin has never been the answer.
Where the tin wins
Oily fish, anywhere far from the coast. In Denver, a good tin of sardines or mackerel is a fresher fish than the counter can honestly offer, and it tastes it. Anchovies, everywhere. The cured anchovy is a different and better thing than the fresh fish for every purpose except frying them on a Mediterranean quay. Shellfish that do not travel. Galician mussels, cockles and razor clams from the rías are canned within hours; the same shellfish "fresh" in the mountains is a gamble. Tuna belly. Ventresca in oil is a cut that barely exists at an American counter and is at its best confit in the tin. Anything you want to keep. A tin waits a year in the cupboard; a fillet waits two days. Anything you want to eat cold, quickly, without cooking. Lunch.
Where fresh wins
Lean white fish. Cod, halibut, sea bass, snapper, trout from a Colorado river: nothing in a tin does what a fresh fillet does in a hot pan or under chermoula in the oven, and the tinned versions are minor. Anything you are going to sear, grill or roast whole. Texture that a tin cannot provide. Salmon, where the fresh and frozen wild fish is excellent and the tinned version, though useful, is a different food. Raw preparations. Crudo, ceviche, sushi need fish handled for that purpose, and the tin is not it. Fresh anchovies and sardines on the coast itself, grilled the day of the catch, which is the one experience the tin is trying to remember.
The verdict, by species
| Fish | In Denver, buy | Because |
|---|---|---|
| Sardines | Tinned | Oily, fast to decline, canned at the peak, improved by the oil |
| Mackerel | Tinned (or frozen) | Same; the fresh fish is rarely at its best inland |
| Anchovies | Tinned, always | The cure is the point |
| Tuna | Both, for different jobs | Fresh or frozen loin for searing; tinned belly for everything else |
| Mussels, clams, cockles | Tinned, unless a trusted counter | Shellfish travel badly; the tin is hours from the water |
| Squid and octopus | Both | Fresh or frozen for grilling; tinned in ink or oil for the table |
| Trout | Fresh, local | Colorado's own fish; smoked in a tin is the exception, for brunch |
| Salmon | Fresh or frozen wild | The fresh fish is excellent and the tin is a different thing |
| Cod, halibut, white fish | Fresh or frozen | Lean, declines slowly, freezes well, made for the pan |
The nutrition and the footprint, briefly
Nothing is lost in the tin that matters: the omega-3 fats, the protein and, in whole sardines, the calcium of the bones survive canning intact, as the nutrition page sets out. And a tin that traveled by sea and truck at ambient temperature and will never be thrown away has a smaller footprint than a fillet flown on ice to a landlocked city and discarded a third of the time; the tin is the sustainable fish for anyone who does not live within a day of a boat.
How a landlocked kitchen should divide its money
Spend on fresh where fresh is the point: a good fillet of white fish or a piece of wild salmon once a week from a counter you trust, cooked simply. Spend on tins for everything oily, everything preserved, and everything eaten cold or fast: sardines, mackerel, anchovies, tuna belly, shellfish. Keep the tins in the cupboard and buy the fresh fish the day you cook it. That is not a compromise; a thousand miles from the ocean, it is the way to eat the best version of each fish. The tins are at 263 Josephine Street in Cherry Creek, Denver, and ship nationwide from theambrosianpantry.com; the first six tins are where to start, and the trout is in the river.
