How to Choose Sustainable Seafood on the Coast

Why the Coast Should Be Your Fishmonger

There is a particular pleasure in buying fish within sight of the water it came from. The harbour wall is still wet, the boats are still tied up, and the smell of salt and diesel hangs over the stalls. Buying from a quayside shop, a harbour-side stall or a coastal market cuts out a lot of the middlemen, puts money directly into the pockets of the people who actually went to sea, and gets you fish that is often less than a day out of the water. That freshness is worth more than any amount of clever packaging.

But local is not automatically sustainable. The seas around the British Isles are busy and heavily pressured, and a thriving harbour can still be landing species that are struggling. A little knowledge turns a pleasant morning out into a genuinely good choice — for your dinner, for the fishing communities you are supporting, and for the fish themselves.

Start With What Has Actually Been Landed

The single most useful habit is to walk up to the slab and ask what came in today. A good fishmonger will light up at the question, because it means you are paying attention. Anything landed within the last twenty-four hours will be in better condition than fish that has travelled, and it will usually come from a boat working grounds just offshore rather than a factory vessel halfway across the Atlantic.

• Day boats — small vessels that go out and come back within a day — tend to fish shorter trips, handle their catch more carefully and land it in better nick. Many harbour stalls are supplied almost entirely by them.
• Specific place names such as "landed in Newlyn" or "caught off the Northumberland coast" tell you something useful. A vague "wild caught" on its own tells you almost nothing about where or how.
• Volume and price are clues. If a species is piled high and cheap in the middle of its spawning season, that is often a sign of pressure rather than abundance.

Eat With the Seasons, Not the Supermarket

Seafood has seasons just like asparagus, and eating with them spreads demand across many species instead of hammering the same few favourites all year. It also gets you better fish at better prices. Roughly speaking, along the British coast:

• Spring: crab, lobster, pollack, whiting, early mackerel.
• Summer: mackerel, sardines, squid, red mullet. Bass only if you can find line-caught fish from a well-managed local fishery, and never during the closed season.
• Autumn: mussels, oysters, hake, cuttlefish, gurnard.
• Winter: scallops, lemon sole, haddock, cod, sprats, herring, clams.

Spawning closures exist for good reason, and they vary around the coast. If something is out of season and you buy it anyway, you are adding to the pressure at the exact moment the stock can least afford it. Ask your fishmonger what is at its best this week and let that decide your menu.

Read the Label and Ask Two Questions

Labelling on fresh fish is patchy, which is why asking matters more than reading. Two questions do most of the work: "Where was it caught?" and "How was it caught?" The gear matters enormously. Line-caught mackerel, pot-caught crab and hand-dived scallops generally cause far less disturbance to the seabed and produce far less unwanted catch than dredges and bottom trawls. A fishmonger who can answer both questions without hesitation is one worth returning to.

Look out for independent certification marks: a well-recognised blue tick on the label or menu is a decent shorthand for a fishery that has been assessed. For farmed fish, look for schemes that cover feed, escapes and welfare rather than just the word "farmed". And bear in mind that farmed mussels, oysters and clams are among the lowest-impact seafoods you can put on a plate — they need no feed at all, and they actually clean the water as they grow.

Look Beyond Cod and Salmon

The most effective thing an individual shopper can do is buy the fish nobody else is asking for. Pollack, coley, whiting, megrim, gurnard, hake, spider crab, pouting and cuttlefish are all excellent eating and all too often go for bait or export because demand is concentrated elsewhere. Ask what is cheap and abundant and let the fishmonger steer you — a whole gurnard roasted with herbs and lemon will hold its own against anything on a restaurant menu.

Size matters too. Give the mature breeding fish a miss where you can, and take the smaller, younger ones that are already landed. Buy whole fish when you can and ask for it gutted and filleted on the spot; you will get better value, and you can see exactly what you are buying.

Buy It, Keep It, Cook It Well

Bring a cool bag and a couple of ice packs, especially if you have a drive home. Ask for your fish to be gutted, scaled and packed on ice. Keep it at the bottom of the fridge and cook it within a day, or freeze it straight away if you are not eating it that evening. Fish is delicate: an extra day in a warm car undoes every careful choice you made at the counter.

Finally, build a relationship. Get to know the people on the quay, tell them what you cooked, and ask what they would buy themselves. Coastal communities thrive on this kind of trade, and a familiar face behind the slab is the best guide you will ever have to what is genuinely good, genuinely local and genuinely worth taking home.