Anchovies or Sardines? Two Different Fish, Two Different Jobs, and the One Confusion That Ruins Dinners
The confusion is understandable: two small silver fish, both in tins, both from the same coasts, both called "oily fish" by dietitians, and both feared by the same people. So a recipe calls for anchovies and a cook uses sardines, or a person who liked a sardine on toast buys a tin of anchovies for lunch, and both are unhappy. The two fish are not interchangeable, and the reason is not subtle. On our shelf an anchovy is a salt-cured fillet whose job is to disappear into a dish and make it taste deeper; a sardine is a cooked whole fish whose job is to be eaten. They are different species from different families, they are preserved differently, and they taste of different things. This is the comparison, and then the substitution, which works in one direction only.
The table
| Anchovies | Sardines | |
|---|---|---|
| The fish | Engraulis encrasicolus, the European anchovy; a slim fish with a large mouth, four to six inches; family Engraulidae | Sardina pilchardus, the European sardine or pilchard; a deeper-bodied fish, six to eight inches; family Clupeidae, with herring |
| Where | Bay of Biscay (Cantabria), the Mediterranean (Sicily, Liguria, Collioure), the Adriatic | Atlantic Portugal and Galicia, Brittany, Morocco, the Mediterranean |
| How it is preserved | Salt-cured: gutted, layered in salt for six months to a year, then filleted by hand and packed in oil. Never cooked. | Cooked: cleaned, brined briefly, steamed or fried, packed in oil, then sterilized in the tin. Never salt-cured. |
| Salt | Very high: several grams per 100 | Moderate: a few hundred milligrams per tin |
| Flavor | Intensely savory, salty, umami-rich; the cure develops it, like ham | Rich, mild, faintly sweet, like a good fresh oily fish; the cooking preserves it |
| Texture | Dense, silky, dissolves under heat | Firm flakes, soft edible bones in whole fish |
| Job | Seasoning: a fillet or two dissolved into a sauce, a dressing, a butter, a braise | Food: eaten whole on toast, in a salad, over pasta, from the tin |
| Eaten straight | One fillet on buttered bread, for the converted | A tin, for lunch, for anyone |
| Nutrition (per 100 g) | About 1.5 to 2 g omega-3, 29 g protein, sodium in the thousands of mg | About 1 to 1.5 g omega-3, 25 g protein, calcium from the bones, sodium in the hundreds |
| Price | High per tin, low per use: a tin is a month of seasoning | Moderate per tin, a tin is one meal |
| The classic dishes | Puttanesca, salsa verde, bagna cauda, Caesar dressing, tapenade, anchovy butter, gildas | Sardine toast, pasta con le sarde, escabeche, grilled at a Lisbon festival, on a cracker with a beer |
The cure is the whole difference
Everything in the table follows from one fact: the anchovy is cured and the sardine is cooked. Months in salt do to an anchovy what they do to a ham, breaking proteins into the amino acids, glutamate above all, that the tongue reads as savory depth, and concentrating the fish into something that can season a pound of pasta with two fillets. That is why anchovies are the pantry's umami, why they vanish into sauces, and why the anchovy guide spends most of its length on how to hide them. A sardine is cooked within a day of the catch and sealed, which preserves it as fish: mild, rich, whole. That is why sardines are lunch, why the sardine toast piece exists, and why the cannery piece is about sardines and not anchovies. One process makes a seasoning; the other makes a meal.
The exceptions that confuse people
Boquerones are anchovies, but fresh ones marinated in vinegar rather than cured in salt: white, tangy, mild, eaten whole like a sardine. They are the one anchovy that is food rather than seasoning. Fresh anchovies, fried or grilled in a Mediterranean port, are a different experience again and rarely reach a tin. Sprats, the small smoked Baltic fish in tins, are neither, though they look like both; they are a third species in the herring family. And "sardines" in an American supermarket can may be any of several small fish, including young herring, which is why the Latin name on the label matters, as the label guide insists.
The substitution, in the one direction it works
Anchovies can stand in for the savory role of almost anything: a mashed fillet replaces a spoon of fish sauce, of colatura, of garum, or of Parmigiano in a dressing, and the substitution chart has the ratios. Sardines cannot do that; mashed into a sauce they add fish, not depth, and the dish tastes of tinned fish rather than of a cook who knows what they are doing. In the other direction, a sardine can be eaten wherever a fish is wanted, and an anchovy cannot: put a tin of anchovies on toast expecting a sardine and you will eat a mouthful of salt. The rule: anchovies replace seasonings, sardines replace fish, and never the reverse. The one dish that genuinely wants both is a pasta con le sarde, where the anchovy seasons the sauce and the sardine is the sauce, which is why Sicily invented it.
Which to buy, if only one
The anchovy, and it is not close. A tin of good Cantabrian fillets makes a month of pasta, dressings, braises and butters better, one fillet at a time, and nobody at the table will taste fish. The sardine is the better lunch, the better first tin, per the six, and the better source of calcium, and it belongs on the shelf too; it is simply not a pantry staple in the way a seasoning is. Own both, keep the anchovies in the cupboard until opened and then in a jar under oil in the refrigerator, and eat the sardines at room temperature with lemon. Both are at 263 Josephine Street in Cherry Creek, Denver, and ship nationwide from theambrosianpantry.com, on the same shelf and, this page hopes, no longer in the same sentence.
