Crab is a perishable thing, and it never improves with travel. A brown crab hauled out of a pot at dawn, cooked in a big pot on the harbour wall and picked by hand the same morning is a different creature entirely from one that has spent three days in a chilled lorry. The white meat stays sweet and firm, the dark brown meat keeps its deep, almost liverish richness, and the shell still carries that clean, cold, seaweed-and-salt smell of the tide.
That is the whole argument for eating crab in a coastal village rather than a city restaurant. You are eating something that has barely stopped moving. It is also worth knowing your seasons. Brown crab is available all year but is at its plumpest between late spring and early autumn. Spider crab has a short, glorious run in the warmer months, mostly along the south and south-west. Velvet crab is the Scottish and northern speciality, best in the colder months. And a crab that has recently moulted will be watery and disappointing, so it pays to ask. A good fishmonger will tell you honestly which crab on the slab is full and which is not.
The best crab is rarely served in a place with a wine list. It is served from a shed, a converted net loft or a café with a dozen mismatched tables and a view of somebody's creels stacked against the wall. Look for these signs:
A jug of lemons, a block of butter softening on the side and a stack of brown bread are all excellent omens. So is a lack of pretension. Nobody who really knows crab feels the need to garnish it with anything more than black pepper.
Dressed crab is the benchmark, and every coastal village has its own version. The shell is cleaned and used as the dish. White meat from the claws and legs goes on one side, dark brown meat on the other, sometimes bound with a little fresh breadcrumb. Some cooks add a pinch of cayenne, some a scatter of parsley, some a thin slick of clarified butter. That is about as far as it should go.
It arrives with thick-cut brown bread and salted butter — a proper wholemeal, or a soda bread if you are somewhere Irish-influenced — and a wedge of lemon. Squeeze the lemon over the white meat, not the brown. Spread the brown meat on the bread; it is intense, almost gamey, and it makes the white meat taste even cleaner by contrast. A few drops of malt vinegar on the brown meat is a fine northern habit, and a grind of black pepper does no harm at all.
Eat slowly. Use the small fork, work your way down into the shell, and resist the urge to drown anything in sauce. If the crab is good, mayonnaise is an insult. A glass of something dry and local, or simply cold water, is the right accompaniment.
If you have more than one meal in you, work through the variations. Each village does one of these better than anywhere else.
The day's crab goes early, so aim to eat before one o'clock. Ask what time the boat landed. Many harbour cafés sit on quays that flood at high water, and some only open when the tide allows, so a glance at the tide table before you set out is never wasted.
Bring cash. A surprising number of fish shacks and beach huts still do not take cards. If you intend to buy crab to take home, take a cool bag and a freezer block with you — an unplanned purchase of half a dozen velvet crabs on a warm afternoon is a sad thing to waste.
Eat outside if you can, but treat seagulls with genuine respect. Hold your plate, keep your back to the wall, and never leave a crab shell unattended on a picnic bench. They know exactly what they are doing, and they are faster than you are. Dress for the wind even in July; a harbour wall can be ten degrees colder than the car park.
Buy from the quay, a fisherman's shed or a small wet fish shop rather than a supermarket, and ask when it was cooked. Eat white meat within two days and brown meat within three, keeping it well covered at the bottom of the fridge. If you ask the fisherman to pick it for you, expect to pay for the labour — and be gracious about it, because it is tedious work. Freeze what you cannot finish, but only the white meat, and only if you plan to use it in something cooked rather than eaten cold.
And do one thing before you leave the village: sit on the wall with the shell in front of you, look out at the water it came from, and take your time. That, more than any recipe, is what crab is for.
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