Whole bronze smoked sprats and flaked smoked trout on buttered dark rye bread, with pickled red onion and a lemon wedge on a worn wooden board

Smoked fish in tins: The Complete Guide

A tin of smoked fish is preserved twice. First the fish is salted and smoked, which gives it its color and flavor. Then it is sealed in a tin and heat-processed until it is commercially sterile, and that is what lets it sit in a cupboard for years. Two fish anchor the category. The sprat is a finger-length relative of the herring, smoked and packed side by side. The trout is smoked and packed as fillets. Smoked herring, mackerel, sardines, salmon and even cod liver sit around them. Tinned fish as a whole is covered in the complete tinned fish guide. This page sticks to the smoked tins.

The sprat

The sprat is Sprattus sprattus, a small schooling fish of the Northeast Atlantic, the North Sea, the Baltic and the northern Mediterranean. FishBase gives its common length as about 12 centimeters and its maximum age as six years. It feeds on planktonic crustaceans and belongs to Clupeidae, the family of herrings, shads and sardines. The canning trade sells it as brisling, and Fangst calls its Baltic Sea sprats "the Nordic sardine" in its product titles. In Latvia it is the fish in Rīgas šprotes, Riga sprats. The Latvian cannery Brīvais Vilnis lists three ingredients for its tin: smoked Baltic Sea sprats, rapeseed oil and salt. The European sardine is a different fish, Sardina pilchardus, a close relative that FishBase now places in its own family of shads and sardines.

The trout

The smoked trout in the tins covered here is rainbow trout, Oncorhynchus mykiss. FishBase records it as native to the Pacific drainages of North America and farmed and introduced far beyond them. Trout goes into the tin as fillets, and a fillet breaks into flakes, so it works in a spread or a salad as well as on bread. A sprat is eaten whole, a bite at a time.

Smoke first, then the tin

Smoking comes in two kinds, cold and hot. Cold-smoked fish, like the nova-style salmon sold at a bagel counter, is smoked at temperatures that flavor the flesh without cooking it. Hot-smoked fish is cooked through in the smokehouse. The tin then adds the step that lets the fish leave the fridge. After sealing, the tin goes into a retort, a closed vessel that heat-processes it until the contents are commercially sterile. Federal regulation defines that as free of microorganisms that could grow in the food at normal non-refrigerated storage. Fish in oil is a low-acid food in the regulatory sense, with a pH above 4.6 and enough moisture for bacteria to grow, which is why this heat step is required. So whichever smoke a maker uses, every fish in a shelf-stable tin has been heat-processed in the tin. The smoke gives the flavor, and the retort does the preserving.

The smoked tins, side by side

Sprats and trout anchor the category, but smoke turns up across tinned fish. The table sorts each fish by species, how it goes into the tin, and where it sits on the FDA and EPA mercury chart. That chart is written for people who are pregnant or breastfeeding and for children, the strictest audience, which makes it the useful one to check.

Fish Species and family How it goes in the tin Bones and skin FDA/EPA tier First use
Sprat (brisling) Sprattus sprattus, herring family Small, smoked, packed side by side Fine, soft bones; bronze smoked skin Not named on the chart; a small plankton-feeder of the herring family Whole on buttered rye
Trout Oncorhynchus mykiss, salmon family Fillets Fillets, little to remove Best choice (freshwater trout) Flaked into salad, potato or a spread
Herring Herring, herring family Fillets or pieces Soft bones where present Best choice With pickled onion and rye
Mackerel Mackerel, mackerel family Small whole fish or fillets Softened bones in small whole fish Best choice (Atlantic mackerel) Rillettes, toast
Sardine Sardina pilchardus, shad and sardine family Whole, smoked before packing Soft, edible bones Best choice Straight from the tin, toast
Salmon Salmon, salmon family Fillet pieces Fillets Best choice Eggs, potatoes, pasta
Cod liver Cod, cod family Smoked liver in its own oil None Cod is a Best Choice; liver is not listed separately Thinly on toast, as a rich spread

Five of the seven fish in the table are on the Best Choices list. Sprats are not named on the chart, and cod is listed but its liver is not. The FDA and EPA suggest two to three servings a week from the Best Choices list, even during pregnancy.

How long a tin keeps

Unopened, for years. The USDA says low-acid canned foods, fish included, keep for two to five years when properly stored. Cool and dry is the rule: not above the stove, under the sink or in a damp garage. The thing to watch for is damage. Throw out any tin that is dented, bulging, leaking or rusted. The tinned fish label guide explains the codes on the back.

Once opened, the fish needs the fridge. The USDA's rule for opened low-acid canned food is three to four days in the refrigerator, and it advises moving the food out of the tin into a covered glass or plastic container. Brīvais Vilnis gives stricter instructions for its sprats: a non-metal container and no more than three days. The tinned fish shelf-life guide applies the same rule to every opened tin.

Pregnancy

Refrigerated and tinned smoked fish get different answers. The FDA's food safety advice for pregnancy says to avoid refrigerated smoked seafood unless it is cooked into a dish such as a casserole. That covers salmon, trout, whitefish, cod, tuna or mackerel labeled nova-style, lox, kippered, smoked or jerky. The concern is Listeria monocytogenes, a bacterium that can grow at refrigerator temperatures. The same guidance lists canned or shelf-stable smoked seafood as safe to eat. The difference is the retort: commercial sterility means no microorganisms that can grow in the sealed tin at room temperature, and a chilled pack has no equivalent step. The mercury tiers are in the table above. None of this is medical advice, and a doctor can speak to the particulars.

Omega-3 and salt

The National Institutes of Health names cold-water fatty fish, including salmon, mackerel, herring and sardines, as rich sources of EPA and DHA, the long-chain omega-3 fats. The tinned fish nutrition guide gives species-by-species numbers.

Smoked fish is salted before it is smoked, and that shows up in the sodium. A 2019 study in the journal Nutrients compared fresh and smoked fish of the same species, rainbow trout among them, and found several-fold more sodium in the smoked fish, which the authors linked to the salting step. The FDA sets the Daily Value for sodium at less than 2,300 milligrams. Its rule of thumb is that 5 percent of the Daily Value per serving is low and 20 percent or more is high. The sodium line on each tin gives the number. A smoked tin can season a dish on its own, so taste before salting the rest of the plate.

Skin, bones and the oil

With sprats, the skin and bones are part of the fish. The fine bones are soft enough to eat, as in a tinned sardine. The skin is bronze from the smoke. Trout comes as fillets, so there is little to deal with, and any skin that is there is edible. The oil has sat with smoked fish and tastes of it, which makes it useful in a vinaigrette or brushed on toast. The guide to using leftover tin oil has more.

How to serve smoked fish from a tin

Sprats and trout go with the same things: dark rye or a plain crispbread, butter, and something cold and sour against the smoke. Pickled onion, cornichons or crème fraîche with lemon all work, with dill if there is any. Sprats are eaten whole on buttered bread. Trout flakes onto a warm potato, into a salad of bitter leaves or through soft scrambled eggs. Smoked mackerel mashes into a spread, the way the mackerel rillettes recipe does it.

The smoked trout and sprat smørrebrød recipe builds the classic open sandwich step by step. For the bread, the crackers guide covers crispbreads and rye. The Danish pantry guide places the fish in the rest of the Nordic kitchen, and the tinned fish tasting guide covers the order and the plates for several tins at once.

Two makers, two accents

Fangst names its smoke and seasoning in its product titles. Brisling No. 1 is Baltic Sea sprat smoked with heather and chamomile (shop Fangst Brisling No. 1). Brisling No. 2 is smoked over beech wood (shop Fangst Brisling No. 2). Brisling No. 4 is mildly spiced with allspice and clove (shop Fangst Brisling No. 4). The same range includes Danish freshwater trout smoked with juniper and lemon thyme (shop Fangst Regnbue Ørred), Norwegian Sea herring smoked with white pepper and ramson (shop Fangst Sild No. 1) and smoked cod liver (shop Fangst Torske Lever). The Fangst and Ramón Peña feature tells the maker's story.

José Gourmet, from Portugal, packs its smoked fish in olive oil. Its smoked tins include trout fillets (shop José Gourmet smoked trout), sardines (shop José Gourmet smoked sardines), small sardines (shop José Gourmet smoked small sardines), small mackerel (shop José Gourmet smoked small mackerel) and salmon (shop José Gourmet smoked salmon). Heather, juniper and ramson on one side, olive oil on the other: the two ranges show two different accents on the same idea. The José Gourmet producer guide covers the rest of the range.

The shop is at 263 Josephine Street in Cherry Creek, Denver, and visitors can ask staff questions in the shop. Products ship nationwide from theambrosianpantry.com.

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