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Full cod guide
How to spot it, where it lives, how it is caught and how to cook it — the complete guide, in one easy read.
Generous, adaptable and a proper winter prize, cod is one of the most loved fish to land and to cook. It feeds over beaches, harbours and deep water alike, and its flakes are as at home in batter as in a slow Sunday bake. Tell it from a haddock, treat it kindly in the pan, and it will repay you all winter.
How to spot it
Cod and haddock get muddled constantly, so start there. Cod has a mottled greenish-brown back and a pale, almost white lateral line; haddock is greyer, with a dark lateral line and a smudgy dark blotch above the pectoral fin, the famous "thumbprint". Beyond that, cod is built to a clear plan: three rounded dorsal fins along the back, two anal fins beneath, an upper jaw overhanging the lower, and a single barbel hanging off the chin like a whisker. The belly is white, and a good fish reaches around 1.2m.
Where it lives
Cod aren't fussy about where they show up, coming from beaches, harbours, jetties, estuaries and deep water. They're mainly bottom feeders, though they'll lift into mid-water readily enough when the food's there. Around Cornwall, Boscastle repays the effort on the north coast, along with the Padstow headlands and Perranporth, and the Penzance area is worth a look too. Their run holds from January through to April, when the colder water pushes them inshore, which is reason enough to wrap up and fish the quiet end of the year.
Catching it
Cod are famously unfussy, which makes them a forgiving fish to target. They'll take almost anything, baited hooks, feathers, jigs or lures, and respond best to fresh, generous baits worked close to the bottom or through mid-water. Fish the beaches, harbours, jetties and estuaries from January through to April, when the cold draws them in. Boscastle, the Padstow headlands, Perranporth and the Penzance area are all worth a try. The minimum landing size for cod in UK waters is 35cm, so carry a measure, return undersized fish quickly, and put back more than you keep on a good night. Check the tides and forecast, and wear grippy boots on the rocks.
In the kitchen
Cod is the white fish that does everything. The flakes are big and dense and hold their shape, so it batters and deep-fries without collapsing, and it's just as happy roasted, poached, baked, or folded into chowder, pie or fishcakes. Parsley, lemon and capers are the classic foil; for something warmer, rub the loin with smoked paprika and chilli and roast it in butter. The one rule that matters: pull it off the heat the moment the flesh turns from glassy to white and the flakes part at a fork. Push past that and it dries. It freezes well too, wrapped tight and thawed slowly in the fridge.
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FAQs
Quick fish questions
Short answers for the questions families and coastal readers often ask first.
How do you tell cod and haddock apart?
Cod has a mottled greenish-brown back, a pale lateral line and a chin barbel. Haddock is greyer, with a dark lateral line and a dark blotch above the pectoral fin, the "thumbprint". Once you've spotted the line and blotch, the two are easy to separate.
How do I identify cod in the UK?
Look for three rounded dorsal fins, two anal fins, an upper jaw that overhangs the lower, and a single barbel under the chin. The back is a greenish-brown mottle, the belly white, with a pale lateral line curving past the pectoral fin.
Is cod sustainable in the UK?
It depends on the source. Some North Sea and Celtic Sea stocks have been under pressure, while Icelandic cod remains certified and well managed, while north-east Arctic cod is now red-rated. Look for MSC-certified or line-caught cod, mind the size limit, and ask where yours was landed.
What is the cod size limit in the UK?
The minimum conservation reference size for cod in UK waters is 35cm. Carry a measure, return anything shorter quickly and carefully, and take only what you'll use to help the stocks recover.
What is the best bait for cod shore fishing?
Cod are unfussy and will take almost anything, including baited hooks, feathers, jigs or lures. They respond best to fresh, generous baits fished close to the bottom, though they'll rise into mid-water to feed when bait is up.
What is the nutrition like in cod?
Cod is lean, high in protein and very low in fat, with useful iodine, selenium, B12 and phosphorus. Baked, poached or grilled it's a light, healthy plate; battered and deep-fried is the treat rather than the everyday version.
How do I cook cod so it doesn't fall apart?
Cook it gently and stop the moment the flakes just part and the flesh turns from glassy to white. Treated that way, cod's big, dense flakes hold together in batter, bakes, pies and chowders rather than crumbling.