By Alex Beleaev | Caviar & Gourmet, London | beleaev.com
A langoustine is a small clawed lobster, not a prawn. Scampi is just the kitchen name for that same langoustine, usually the tail. Prawns are a separate family entirely, warm-water or cold, with no claws. Three words, three different things, and most menus blur the line between them. That confusion is exactly why people overpay for one and overlook another.
So here's the plain version. What sets a langoustine apart from a prawn, why size grades like 5/8 and 8/12 decide what you pay, and how the finest cold-water shellfish actually behaves once it hits the heat.
Key Takeaways
- A langoustine (Nephrops norvegicus) is a small lobster with claws, not a prawn
- "Scampi" is the culinary name for langoustine tail meat
- Size grades (5/8, 8/12, 16/20) count pieces per pack, so a lower number means larger shellfish
- Cold-water shellfish is prized for firm, sweet flesh and is best cooked briefly
- Curious? Explore the Beleaev gourmet collection
What Is a Langoustine, Exactly?
A langoustine is a small, slender lobster that lives in the cold North Atlantic and the North Sea. Its proper name is Nephrops norvegicus, and you will also hear it called the Norway lobster or the Dublin Bay prawn. Pale orange-pink even before cooking, with long thin claws, it looks like a lobster shrunk to the length of a hand.
That is the key point. It belongs to the lobster family, not the prawn family. The flesh in the tail is firm, faintly sweet, and more delicate than lobster but richer than any prawn. Chefs across France and Spain treat it as one of the finest things the cold sea offers.
The animal is small, the yield is modest, and it spoils quickly once landed. All three reasons explain why a good langoustine carries a price closer to lobster than to the prawns sitting next to it on the fishmonger's ice.
Langoustine, Scampi, Prawn: Sorting the Names Out
The vocabulary is a mess, so let's fix it once.
Langoustine is the whole creature: head, claws, tail. Scampi is the Italian word for the same animal, and in a British kitchen it almost always means the shelled tail meat. The breaded "scampi" in a pub basket is often a different, cheaper whitefish or a lesser shellfish entirely, which is part of why the name carries so little meaning on a menu.
A prawn is something else. Prawns are decapods too, but from separate families, and they have no true claws to speak of. They range from small cold-water prawns to large warm-water tiger and king prawns. Excellent eating, but a distinct texture and a gentler flavour than a langoustine tail.
| Langoustine | Scampi | Prawn | |
|---|---|---|---|
| What it is | Small clawed lobster | Langoustine tail meat | Clawless decapod |
| Family | Lobster (Nephrops) | Same as langoustine | Prawn/shrimp families |
| Has claws | Yes, long and thin | (tail only) | No |
| Flesh | Firm, sweet, rich | Firm, sweet | Softer, milder |
| Best for | Plateau, grill, bisque | Pasta, frying, scampi dishes | Curries, grills, salads |
If a menu says scampi and charges langoustine money, you are very likely getting the real thing. If it costs less than the fish and chips beside it, you are not.
How Size Grades Work (5/8, 8/12, 16/20)
This is the part worth understanding before you spend, because it is the single biggest driver of price.
Shellfish is graded by count per pack, not by individual weight. A grade of 5/8 means roughly five to eight pieces make up the pack; 8/12 means eight to twelve; 16/20 means sixteen to twenty. The smaller the numbers, the larger and heavier each individual piece, and the more it costs.
Our Langoustine Tail Pure 5/8 is the top grade we carry: large, premium tails where each piece is a proper mouthful. The Langoustine Tails 8/12 are a touch smaller and more versatile, raw, sweet and firm, the size that drops perfectly into a bisque or sits on a seafood platter. For whole prawns, the Spencer Gulf Prawns 16/20 from Ferguson Australia are graded the same way: sixteen to twenty large, sashimi-grade prawns to the kilo.
So when you compare two packs, ignore the photo and read the grade. A 5/8 and a 16/20 are not the same shellfish at different prices. They are different sizes, and the number tells you which is which.
Why Cold-Water Shellfish Tastes Better
There's a reason serious cooks chase North Atlantic langoustines and cold-water prawns over warm-water farmed stock.
Cold water makes shellfish grow slowly. Slow growth builds dense, firm flesh and concentrates the sweetness, in the same way a slow-grown vegetable beats a forced one. The cold also keeps the texture tight, so a properly handled langoustine tail has a snap to it that warm-water shellfish rarely matches.
Our Spencer Gulf prawns make the same case from the other side of the world. They're wild-caught in the cold, clean waters of South Australia by Ferguson Australia, a respected name in premium seafood, and they're clean enough to eat raw as sashimi. Cold water, careful handling, and a short journey to the freezer: that combination is what you taste.
The catch, quite literally, is that delicate shellfish degrades fast. Which brings us to the freezing.
Why "Frozen" Is the Right Choice Here
Frozen sounds like the compromise. With langoustines and prawns, it is usually the better option, and here's the honest reason.
A langoustine begins to break down within hours of being landed. An enzyme in the flesh softens the meat quickly, so "fresh" langoustines that have travelled for two days are often past their best by the time they reach you. Shellfish that is frozen at sea, or within hours of landing, locks the flesh at its peak. That is what our langoustine tails and Spencer Gulf prawns are: frozen to hold the texture, not to disguise age.
So the snap and the sweetness you want are better protected by a good freeze than by a long "fresh" supply chain. Defrost it slowly in the fridge and you get shellfish closer to its just-caught state than most fishmonger counters can offer.
Beyond the Langoustine: Squid and Skrei Cod Cheek
Two more cold-water names worth knowing, because they round out a proper seafood table.
Squid is the workhorse. Our Squid Tubes are cleaned and ready, 700g net, the kind of thing you slice into rings for a quick fry or stuff and braise. Cheap to buy, generous to cook, and forgiving as long as you respect the rule: cook it fast and hot, or long and slow, never the middle ground that turns it to rubber.
Skrei cod cheek is the connoisseur's pick. Skrei is the migratory Arctic cod that swims down from the Barents Sea to spawn off Norway each winter, prized for firm, snow-white flesh. The cheek is the prize cut, a small round of meat with a scallop-like texture. Our Skrei Cod Cheek is a catchweight item, sold by actual weight, for cooks who already know what they're after.
FAQ
Is a langoustine the same as a prawn?
No. A langoustine is a small clawed lobster (Nephrops norvegicus), part of the lobster family. A prawn is a clawless decapod from a separate family. The langoustine has long thin claws, firmer flesh and a richer, sweeter taste than a prawn, which is why it commands a higher price.
What is the difference between scampi and langoustine?
They are the same animal. "Langoustine" refers to the whole creature, while "scampi" is the Italian name, used in British kitchens for the shelled tail meat. Be wary of breaded "scampi" in pubs, which is often a cheaper whitefish or lesser shellfish rather than true langoustine.
What do the numbers like 5/8 and 8/12 mean?
They are size grades counting pieces per pack. A grade of 5/8 means roughly five to eight tails fill the pack, while 8/12 means eight to twelve. A lower number means larger individual shellfish, so 5/8 tails are bigger and pricier than 8/12.
Why are langoustines so expensive?
They are small, the meat yield is modest, and they spoil within hours of being landed, so handling them properly is demanding. Add their place in the lobster family and the firm, sweet flesh chefs prize, and the price naturally sits closer to lobster than to ordinary prawns.
Is frozen langoustine as good as fresh?
Often better. Langoustine flesh softens fast after landing, so shellfish frozen at its peak holds the texture more reliably than "fresh" stock that has travelled for days. Defrost it slowly in the fridge and the snap and sweetness are well preserved.
Bring the Cold Sea to the Table
Names aside, the pleasure is the same one chefs chase: firm, sweet shellfish from cold water, cooked with a light hand.
Explore the Beleaev gourmet collection, from the premium Langoustine Tail Pure 5/8 to the versatile Spencer Gulf Prawns. When you're ready to cook them, our companion guide covers how to buy langoustines and wild prawns online in the UK. Every piece is frozen to hold the texture and delivered on a cold chain.
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