Buyer's guides
Fish merchant, wholesaler or fish auction:which channel for your volume and trade
Fish auction, fish merchant or wholesaler: access, free delivery, minimums, lead times, freshness risk, delivered price, decision table by profile and volume.
Updated 9 min readLiveCriée editorial team
Contents
- Can you buy at the fish auction yourself?
- Fish merchant or wholesaler: what changes for you?
- Who bears the freshness risk during transport?
- Which channel for which profile? The decision table
- What does the channel change on the delivered price? An illustrative example
- How to combine channels?
- Frequently asked questions
Buying at the fish auction (criée) means bidding yourself on whole lots, as a buyer declared to the auction hall; buying from a fish merchant (mareyeur) means entrusting them with that purchase, the sorting and the shipping; buying from a wholesaler means paying for one more link for local delivery, with little or no minimum, on a wide range. The right channel depends first on your weekly volume, then on your trade and your distance from the port.
The "Find a fish merchant" hub describes who does what. This guide goes further: what each channel requires of you, what it costs you, and from what volume it becomes worthwhile.
Can you buy at the fish auction yourself?
Yes, under conditions designed for wholesale buying: the French rural code speaks of a first placing on the market "en vue de leur vente en gros" (with a view to selling them wholesale) (Art. D. 932-8).
- Declare yourself to the auction hall operator. The buyer provides proof of registration in the trade and companies register or the national business register (food trades or seafood processing), their VAT number and the details of their guarantee. The hall keeps the list of declared buyers (French Rural and Maritime Fishing Code, Art. D. 932-8 and D. 932-9).
- Lodge a guarantee. It secures payment for the lots bought, which the hall passes on to the vessel owners. Its amount corresponds to the financial cover of your purchases (rural code, Art. D. 932-9). A national fund managed by FranceAgriMer, the FNCA, can supplement this guarantee for declared buyers who belong to an approved mutual guarantee company.
- Comply with the operating rules of each hall, set by the prefect: conduct of sales, payment terms, penalties (rural code, Art. D. 932-11 and D. 932-12). The fees charged by the hall are added to the hammer price: ask for the port's fee schedule.
- Be present or connected. Depending on the auction, you bid in the room, remotely, or both: at Boulogne-sur-Mer, the sale is open to fishmongers and restaurant owners, in the room or remotely, after registering with the auction's guarantee body (see the port page).
- Take the whole lot. A lot generally groups one or more boxes of the same species, the same size grade and the same freshness category. You do not pick 4 kg from the box.
Once the lot is knocked down to you, it is yours: preparation, icing, transport and unsold stock are at your expense.
Fish merchant or wholesaler: what changes for you?
| Criterion | Direct at the fish auction | Fish merchant | Local wholesaler (MIN wholesale market, Rungis, delivery firm) |
|---|---|---|---|
| Access | Declaration, guarantee | Account opening, sometimes a first payment in cash | Buyer's card at the wholesale market, or a simple customer account |
| Purchase unit | The whole lot (one or more boxes) | The parcel, at the weight set by the fish merchant | The kilo, sometimes the piece |
| Free delivery and minimum | Not applicable, you collect | Minimum per parcel; free delivery above a weight or an amount | Little or no minimum on a delivery round |
| Lead time | The day of the sale, if you are on site | Generally delivered the next day, depending on the fish merchant and the carrier | The same day or the next day |
| Range | That of the port, that day | That of their port and neighbouring auctions | Several ports and imports |
| Preparation | At your expense | Sorting, gutting, filleting on request | Depending on the wholesaler |
| Freshness risk | Yours from the moment of the hammer | Shared: the fish merchant on preparation, you or them on transport depending on whether the sale is ex-works or delivered | The wholesaler's until delivery |
Units, minimums and lead times vary from one supplier to another: these are orders of magnitude.
Who bears the freshness risk during transport?
It is the question people forget to ask. Under French law, unless otherwise agreed, goods that have left the seller's premises travel at the risk of whoever owns them (Commercial Code, Art. L. 132-7). In practice:
- Ex-works sale (vente départ): the price is understood at the fish merchant's dock. Transport is invoiced on top, and a parcel that warms up on the way is first your problem, with recourse against the carrier.
- Delivered sale (vente rendue): transport is included and, if agreed, the fish merchant takes responsibility for arrival in good condition. A free delivery threshold (franco de port) says who pays for transport, not necessarily who bears its risk: have it specified in writing.
Which channel for which profile? The decision table
| Profile | Seafood volume per week | Main channel | As a complement | Why |
|---|---|---|---|---|
| Restaurant, short menu | Less than 20 kg | Local wholesaler or fishmonger who delivers | A fish merchant for a signature species, in a grouped parcel | The minimum parcel and per-parcel transport weigh too much per kilo |
| Restaurant, seafood menu | 20 to 80 kg | One or two fish merchants direct | Local wholesaler for top-ups | Free delivery becomes reachable by grouping orders over two or three days |
| Fishmonger, fine-dining restaurant or small group | 80 to 300 kg | Two to four fish merchants from different ports | Wholesaler for imports and shortfalls | Several ports for regularity; enough volume to negotiate delivered prices |
| Wholesale fishmonger, regional wholesaler | 300 kg to 1 t | Fish merchants, several coasts | Buying at auction if a port is nearby | The volume justifies declaring at auction for key species |
| Exporter, national wholesaler | More than 1 t | Fish auctions direct (often remotely) and fish merchants | Fish merchants for preparation and export packing | The cost of the guarantee and staff is spread over tonnes |
Editorial benchmarks, neither a standard nor a statistic: the right thresholds depend on the distance from the port, the number of species and the delivery day.
Two rules emerge. First, the more species you buy, the more you need several suppliers, because no port has everything. Second, buying direct at auction is only worth it if you know how to handle the whole lot, from gutting to reselling the fish you do not need.
What does the channel change on the delivered price? An illustrative example
| Item, in € per kg | Direct at the fish auction (buyer close to the port) | Fish merchant, 10 kg parcel, ex-works sale | Fish merchant, 40 kg, free delivery | Local wholesaler, 3 kg on a delivery round |
|---|---|---|---|---|
| Hammer price at auction | 10.00 | 10.00 | 10.00 | 10.00 |
| Buyer's auction fees (assumption 2%) | 0.20 | 0.20 | 0.20 | 0.20 |
| Box, ice, labelling | 0.30 | 0.30 | 0.30 | 0.30 |
| Fish merchant's gross margin (workshop, staff, unsold stock, profit) | 2.00 | 2.00 | 2.00 | |
| Fish merchant ex-works price | 12.50 | 12.50 | 12.50 | |
| Transport | 0.50 (collected by you) | 1.80 (€18 per parcel) | Included by the fish merchant, about 0.70 | 0.60 (shared pallet) |
| Wholesaler's gross margin (assumption 20% of the selling price) | 3.28 | |||
| Delivered price to you | 11.00 | 14.30 | 13.20 | 16.38 |
Illustrative example, hypothetical amounts. Free delivery does not remove transport: the fish merchant builds it into their price or margin.
Three readings:
- The price gap comes mainly from per-parcel transport and successive margins, not from the auction price. Between a single parcel and an order at the free delivery threshold, the same fish loses €1.10 per kilo here.
- The wholesaler costs more per kilo, but not necessarily more per dish. They sell 3 kg where the fish merchant imposes 10 kg: if 7 kg end up badly, the low price no longer exists. The food cost guide does this calculation.
- Buying direct at auction looks unbeatable as long as you do not count the time spent, the guarantee tied up, preparation and the unsold part of the lot.
To set side by side suppliers who sell some ex-works and others delivered, always bring each line back to the price delivered to you. The price list guide gives the method.
How to combine channels?
Most regular buyers do not choose one channel, they assemble two or three:
- one or two reference fish merchants for key species, at the free delivery threshold, with stable size grades;
- a fish merchant on another coast to cover days of bad weather on the first;
- a local wholesaler for top-ups, imports and small quantities.
Each sends their price list, at their own time and in their own format. That is where comparing takes time: everything has to be brought back to the same species, the same size grade and the same delivered price before ordering.
Frequently asked questions
Can a restaurant owner buy directly at the fish auction?
Yes, if they declare themselves as a buyer to the auction hall operator, with their registration in a professional register, their VAT number and a guarantee covering their purchases (rural code, Art. D. 932-9). They must then take whole lots: for a few dozen kilos a week, a fish merchant from the port remains the simplest route.
What is a free delivery threshold (franco de port) for seafood?
It is the threshold, in weight or amount, above which the supplier pays for transport. Below it, transport is invoiced on top, for example per parcel. The free delivery threshold says who pays for transport; who bears its risk is agreed separately.
Is the wholesaler always more expensive than the fish merchant?
Per kilo, generally yes, since they add their margin. On the delivered price and for small quantities, the gap narrows, because they deliver with no minimum and share transport.
Can you buy at a fish auction remotely?
Yes, at auctions that offer it, such as Boulogne-sur-Mer. The access conditions remain the same as for a buyer on site: declaration and guarantee.
Who pays if the fish arrives warm?
Unless otherwise agreed, goods travel at the risk of whoever owns them (Commercial Code, Art. L. 132-7): in an ex-works sale, it is generally you, with recourse against the carrier; in a delivered sale, if agreed, the supplier. Write your reservations on receipt and notify the supplier without delay.
How many suppliers do you need to be well supplied?
At least two different ports for your key species, plus a local top-up. Beyond that, each added supplier is one more price list to read every morning.
Sources
- French Rural and Maritime Fishing Code, Art. D. 932-8 (first placing on the market "en vue de leur vente en gros", list of declared buyers), taken from the check of 22 October 2026: https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000029978431
- French Rural and Maritime Fishing Code, Art. D. 932-9 (declaration of buyers, guarantee), version in force since 1 January 2023, read on 23 October 2026: https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000029978433
- French Rural and Maritime Fishing Code, Art. D. 932-11 (operating rules set by the prefect) and D. 932-12 (content of the operating rules), read on 23 October 2026: https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000029978437 and https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000029978439
- FranceAgriMer, decision INTV-POP-2025-52 of 23 September 2025, rules for managing and using the national fund guaranteeing seafood purchases (Fonds national de cautionnement des achats des produits de la mer, FNCA; beneficiaries: buyers declared under Art. D. 932-9, members of an approved mutual guarantee company), read on 23 October 2026: https://info.agriculture.gouv.fr/boagri/document_administratif-4c4ce933-71b9-4e55-896a-33bb7750135c/telechargement
- Port Boulogne Calais, "Achat à la criée" (buying at the fish auction), page modified on 24 November 2025 (sale open to fishmongers and restaurant owners, in the room or remotely): https://www.portboulognecalais.fr/la-peche-au-port-de-boulogne/achat-a-la-criee/
- French Commercial Code, Art. L. 132-7 (transport risks, in force since 21 September 2000) and Art. L. 133-3 (reasoned protest against the carrier within three days, in force since 10 December 2009), read on 23 October 2026: https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000006220235 and https://www.legifrance.gouv.fr/codes/article_lc/LEGIARTI000006220314
- FranceAgriMer, Observatory of price and margin formation, method (gross margin = selling price minus purchase cost of the product): https://observatoire-prixmarges.franceagrimer.fr/sites/default/files/pictures/03_2026_chapitre_1_methode_generale_v2.pdf
Read next
- French fishing portsFrench fishing ports and fish auctionsBoulogne-sur-Mer, Brest, Cherbourg, Concarneau: the French fish auctions, their sale times, their species and their fish merchants.
- Buyer's guidesThe seafood price list (mercuriale)The price list (mercuriale) is a fish merchant's list of the day's prices. How to read it line by line and set those of several suppliers side by side.
- Buyer's guidesRecipe costing sheet and food cost of fishCalculating the food cost of a fish dish: fillet yield by species, step-by-step calculation with a worked example, effect of size grade and purchase price.