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Sea bass:professional buying guide, season, size grades, wild or farmed

European sea bass for the trade: season, price-list size grades, French fish auctions, line or trawl, wild or farmed, fillet yield and substitutes.

Updated 7 min readLiveCriée editorial team

Contents
  1. Buying sheet
  2. When to buy wild sea bass?
  3. Wild, line-caught or farmed: how not to get it wrong?
  4. How to judge the freshness of a sea bass?
  5. What to replace sea bass with when it is short or expensive?
  6. What makes the price of sea bass move?
  7. Frequently asked questions

European sea bass (Dicentrarchus labrax), called "loup" on the French Mediterranean coast, is a round fish caught in the North-East Atlantic, the English Channel and the Mediterranean, and widely farmed in the Mediterranean; on a French price list it comes as line-caught, trawl or net-caught, and farmed sea bass, three products with different prices and uses. In France, the permitted trade names are "bar", "bar commun" and "loup". The production method ("caught" or "farmed") and the category of fishing gear must appear on the label.

Buying sheet

Sea bass
Scientific nameDicentrarchus labrax
Peak season (wild)December to March. In 2024, January and December were the two biggest months of auction sales; low from May to September
Closed seasonEnglish Channel, southern North Sea and Celtic Sea: in 2026, commercial fishing closed in February and March, open in January and from April to December with annual catch limits per vessel (EU regulation 2026/249). Bay of Biscay: no closure specific to sea bass, but a licence and annual catch limits, and a one-month winter stop for part of the trawlers, gillnetters and seiners (protection of small cetaceans)
Minimum size42 cm in the English Channel, North Sea and Celtic Sea; 36 cm in the Bay of Biscay; 25 cm in the Mediterranean
Size grades on price lists (examples of trade practice, not a standard)Farmed: 200 to 300 g, 300 to 400 g, 400 to 600 g, 600 to 800 g. Wild: 500 g to 1 kg, 1 to 2 kg, 2 to 3 kg, 3 kg and over
Main French fish auctions (2024)2,240 t sold at auction in France. Les Sables-d'Olonne 14%, Oléron 10%, Noirmoutier 9%, Lorient 6%, La Turballe 6%, La Rochelle 5%, Le Guilvinec 5%
OriginsWild: North-East Atlantic (FAO area 27: Bay of Biscay, English Channel, Celtic Sea) and Mediterranean (FAO area 37). Farmed: Turkey first, then Greece and Spain
Fishing methodsLine and longline ("line-caught sea bass"), gillnet, bottom trawl, pelagic trawl on the winter concentrations
Yield44% as skin-on fillets for an 850 g sea bass, scaled, filleted and pin-boned (Seafish); less when skinned
StorageWhole and gutted, on melting ice (0 to 2 °C)

Minimum size: Regulation (EU) 2019/1241, Annexes V, VI, VII and IX. Tonnage and shares calculated by the editorial team from the sales declared at French fish auctions in 2024 (FranceAgriMer, workbook published on 2 July 2026). These figures only cover fish sold at auction, not fish sold by private agreement. National rhythm of auction sales (FranceAgriMer, 2024); it varies from one port to another.

  • 2,240 tof sea bass sold at French fish auctions in 2024
  • 14%of these sales at Les Sables-d'Olonne
  • 44%skin-on fillets for an 850 g sea bass

Source: FranceAgriMer, sales declared at fish auctions 2024, workbook published on 2 July 2026; Seafish (yield).

When to buy wild sea bass?

Wild sea bass is plentiful in winter, when it gathers to spawn. Auction landings are more than twice as high in January as in June. In summer, supply shrinks to handliners and inshore gillnetters.

Two supply breaks come back every year. In the north, the February and March closure cuts off Channel sea bass. In the Bay of Biscay, part of the fleet has stayed in port for one month in winter since 2024 (from 22 January to 20 February from 2024 to 2026; in 2027, thirty consecutive days, chosen by each vessel owner between 15 January and 27 February 2027 and declared before 1 December 2026, or, failing a declaration, from 22 January to 20 February 2027; French order of 9 September 2026). During the northern closure, Bay of Biscay sea bass and farmed fish take over on price lists; during the Biscay stop, it is mostly farmed fish.

Wild, line-caught or farmed: how not to get it wrong?

  • The label decides. "Farmed" or "caught" is mandatory, as are the area and the gear. A "line-caught sea bass" (bar de ligne) corresponds to the gear "hooks and lines".
  • Size is a clue. In the English Channel and the North Sea, a landed wild sea bass measures at least 42 cm. A "wild sea bass" of portion size, very regular from one batch to the next, should raise the question of its origin: regularity is the mark of farming.
  • The fish gives clues. Wild sea bass is usually more slender, with a firm, lean belly and intact fins. Farmed sea bass is often stockier, with fat in the belly cavity at gutting, and very regular sizes. These are trade clues, not proof: the label is what counts.
  • Trawl-caught sea bass is sometimes scaled or marked by friction; net-caught sea bass can carry the marks of the mesh. Line-caught sea bass, handled one by one, most often arrives intact.

How to judge the freshness of a sea bass?

Bulging, black and shiny eye; bright red gills; scales firmly attached; silvery, shiny skin with clear slime; firm flesh that springs back under the finger; a smell of iodine, never of ammonia. A soft or burst belly is the first sign of a tired fish.

What to replace sea bass with when it is short or expensive?

UseSubstituteNote
Whole fish, salt crust, ovenGilthead sea breamsame yield (44%), comparable portion
Pan-fried fillet or loinMeagre, pollackfirm flesh, large sizes available
Raw, tartare, carpaccioGilthead sea bream, large farmed sea bassdemand flawless freshness

What makes the price of sea bass move?

Average first-sale price at auction, France, 2024Sea bass
Yearly averageabout €15.50/kg
Cheapest monthJanuary: about €10.30/kg
Most expensive monthAugust: about €22.20/kg
Spread between auctionsfrom €13.20/kg (La Turballe) to €17.40/kg (Noirmoutier)

Year 2024, all French fish auctions: average first-sale price at the auction hall (FranceAgriMer, sales declared at fish auctions, workbook published on 2 July 2026). Spread between auctions: among those handling at least 5% of sea bass volumes. The auction price is not the price paid to the fish merchant: processing, transport and margin are added to it.

The price of sea bass moves against its landings. In January 2024, the busiest month of the year (310 t sold at auction), it was at its lowest; from May to September, sales stayed under 150 t a month and the price above €17.90/kg, up to €22.20/kg in August. December is the exception: second month of the year by volume (245 t), it still sells at around €16.90/kg, above the yearly average (€15.50/kg), when holiday demand comes in. 2025 shows the same profile, with August still the most expensive month. The spread of about €4/kg between auctions probably comes first from what each auction hall sells (gear, sizes, local outlets): it does not measure the price of the same fish from one port to another.

  • The season: the price moves against landings. In 2024, the average auction price more than doubled between January (about €10/kg) and August (about €22/kg).
  • The size: large fish cost more per kilo, but yield better as portions (see the food cost guide).
  • The fishing method: line above net and trawl; farmed lower and steadier.
  • The holidays: year-end demand pulls up the large sizes.
  • The weather: a gale keeps handliners in port, and line-caught sea bass disappears from one day to the next.

Frequently asked questions

When is sea bass in season?

Wild sea bass is most plentiful from December to March, with a peak in January. It becomes scarce from May to September. In the north, commercial fishing was closed in February and March 2026. Farmed sea bass is available all year round.

How to tell wild sea bass from farmed sea bass?

By the label first: the mention "farmed" or "caught" is mandatory. Then, as clues, by the shape (wild fish is more slender), belly fat (more marked in farmed fish) and the regularity of sizes. In the English Channel and the North Sea, a landed wild sea bass measures at least 42 cm.

What is the fillet yield of a sea bass?

About 44% of the whole weight as skin-on fillets for an 850 g sea bass (Seafish). For 160 g of fillet per plate, you need to buy about 364 g of whole fish.

Why is line-caught sea bass more expensive?

Because it is caught one fish at a time, in small quantities, by vessels that stay in port in bad weather, and it arrives in better condition. The mention "line" must correspond to the gear "hooks and lines" on the label.

What is the auction price of sea bass in France?

In 2024, about €15.50/kg on average at first sale in French fish auctions, from about €10.30/kg in January to about €22.20/kg in August (FranceAgriMer). This is a first-sale price, all gears combined: the price paid to the fish merchant adds processing, transport and margin.

Sources

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