Basa substitutes

Not really a substitute at all, because it is the same species. Basa, pangasius, river cobbler and swai are four market names for the same farmed Mekong catfish, so the fillet thickness, softness, mildness and cooking time are identical. If your recipe asks for basa and the freezer only has swai, buy it and change absolutely nothing about the method.

Best for

any recipe calling for basa, pan-frying, baking, curries, fish and chips, fish pie

American shops mostly use swai, British and Irish shops use basa or river cobbler, Australian shops use basa. All the same fish.

The most useful genuine alternative and about the same price. Basa's job in a recipe is to be inexpensive, boneless, mild protein that carries a curry, a batter or a sauce, and tilapia does that job with a firmer constitution. Because it is denser and less watery, tilapia browns properly in a pan, holds its shape in a simmering sauce and is far less likely to collapse, but it also tastes a shade less tender and a shade more mineral.

Best for

curries, pan-frying, baking, breaded fillets, fish tacos, traybakes

Tilapia fillets run slightly thicker, so allow an extra minute or two.

The cheapest saltwater whitefish and a real improvement on flavor. Pollock is lean with a clean, faintly briny taste and proper soft flakes, so a fish pie or a battered fillet made with it tastes fresher and lighter than the same thing made with basa, which leans slightly sweet and earthy. Pollock fillets are thicker, so add two to four minutes, and they are less prone to disintegrating in liquid.

Best for

fish and chips, fish pie, baked fish, chowder, fish fingers

Coley and saithe are the same fish and often cheaper still. Their greyer raw flesh whitens as it cooks.

The proper upgrade, and the fish most basa recipes are quietly imitating. Both give you large clean flakes and a bright marine flavor rather than basa's near-neutral softness, which transforms fish and chips, fish pie and chowder. Cod is firmer and holds together best; haddock is softer, sweeter and closer to basa in tenderness. Both cost meaningfully more and both are thicker, so extend the cooking time and check the center.

Best for

fish and chips, fish pie, baked fish, chowder, fish cakes

Because these fish actually taste of something, ease back on heavy seasoning you added to compensate for bland basa.

The best match for basa's thin, quick-cooking shape, and a big step up in quality. These flatfish fillets are similarly slim but much finer-grained and genuinely sweet, so a pan-fry with butter and lemon is delicious rather than merely fine. They are also more fragile, cook in three or four minutes, and cannot survive a long simmer or a heavy beer batter without breaking up.

Best for

pan-frying, meuniere, rolled and baked fillets, grilled fillets

Turn them once with a thin fish spatula and stop as soon as the flesh turns opaque.

Basa's closest relative among fish you can readily buy fresh, and the sturdiest option for frying. Channel catfish has a firmer flake and a distinctly earthier, sweeter, more forward flavor, so a cornmeal-fried fillet tastes markedly more of fish. In a delicate cream or lemon sauce that extra character can be intrusive, so save it for fries, blackened preparations and stews.

Best for

deep frying, blackened fish, stews, grilling, curries

Fillets are thicker and need a longer cook. Farmed catfish is milder than wild-caught.