Fish Markets, Fishmongers Industry Terminology
Aquaculture
The farming of aquatic organisms (fish, shellfish, seaweed) under controlled conditions to produce food and other products. It spans hatcheries, grow-out, and harvest, and can be land-based (RAS), pond, or net-pen operations.
We increased farmed salmon purchases to balance wild catches and secure year-round supply. Verify the farm’s feed, FCR, and antibiotic practices before onboarding a new aquaculture vendor.
ASC (Aquaculture Stewardship Council)
A global certification program for responsibly farmed seafood, covering environmental and social criteria. ASC Chain of Custody ensures products sold as ASC originate from certified farms and are kept segregated and traceable.
These prawns are ASC certified, which helps our sustainability cred with corporate catering clients. We need ASC Chain of Custody certificates from the distributor before we print the green label.
Auction, Dutch
A descending-price auction format often used in wholesale fish markets where the price starts high and drops until a bidder accepts it. Also called a clock auction.
Prices fell fast on the clock auction this morning, so we secured hake at a discount. If we bid too late in the Dutch auction, the lot could be gone to another buyer.
BAP (Best Aquaculture Practices)
A certification program (Global Seafood Alliance) for farmed seafood that audits environmental, social, food safety, and animal welfare practices. Uses a star rating to denote how many parts of the value chain are certified.
The supplier offers 4-star BAP tilapia, covering hatchery, farm, feed mill, and processing plant. Our retail banner requires BAP or ASC certification for all farmed shrimp SKUs.
Bleeding (Bleed-Out)
The practice of draining blood from fish soon after harvest (often via gill cut and seawater immersion) to improve flesh quality, color, and shelf life.
Bleed the tuna immediately to minimize bruising and improve shelf life. The lot with poor bleed-out showed more gaping and shorter display life.
Bycatch
The incidental capture of non-target species during fishing. Managing and reducing bycatch is a key sustainability and regulatory priority.
This trawl fishery reduced bycatch with larger mesh and turtle excluder devices. Our sustainability policy prefers longline tuna with proven seabird bycatch mitigation.
Candling
A quality control technique where fillets are placed over a bright light to detect parasites or defects that are hard to see otherwise.
Candle the salmon fillets to spot and remove Anisakis worms before packing. The inspector asked for candling records for the cod loins destined for raw service.
Carbon Monoxide (CO) Treated Tuna
Exposure of tuna to CO to stabilize a bright red color. Regulatory status varies by country; labeling and transparency are essential because color can mask age without proper handling.
The color looks great, but remember CO treatment isn’t a freshness indicator. Check local rules—CO-treated tuna may be restricted or require specific labeling.
CCP (Critical Control Point)
A point in a process where control can be applied to prevent, eliminate, or reduce a food safety hazard to acceptable levels; a core element of HACCP.
Freezer temperature monitoring is a CCP in our HACCP plan. Histamine control for mahi is addressed at the receiving CCP with thermometer checks and lot records.
Chain of Custody (CoC)
Documented, auditable control of certified product from origin to sale, ensuring certified goods remain segregated, traceable, and eligible for labeling.
We need CoC documentation to label this as MSC certified. The distributor lost CoC segregation, so the batch can’t be sold with the ecolabel.
Cold Chain
The continuous, verified control of temperature from harvest or processing through storage, transport, and retail display to keep seafood safe and high quality.
Maintain 0–2°C for fresh fish and below −18°C for frozen to protect the cold chain. A lapse in the cold chain during delivery shortened the cod’s shelf life by two days.
Count per Pound (Shrimp Count)
A sizing system for shrimp indicating how many pieces make up one pound (e.g., 16/20). U/10 means under 10 pieces per pound.
The spec calls for 16/20 shrimp; the delivered case tested at 21/25, so we rejected it. For the promo, switch to U/10 for bigger visual impact in the case.
Depuration
The process of purging live bivalves in sanitized, controlled seawater systems to reduce microbial contamination before sale.
These clams must undergo 36 hours of depuration before sale. Verify the depuration facility log for flow rate, UV treatment, and water quality parameters.
Dressed Weight (H&G)
Weight of a fish after heading and gutting (H&G). Often used for pricing and yield calculations compared with whole round and fillet weights.
Price the halibut on dressed weight (headed and gutted), not whole round. The yield from whole to H&G averaged 78% on yesterday’s batch.
Ex-Vessel Price
The price paid to fishers at the dock for landed catch, before processing and distribution markups.
Ex-vessel prices spiked after the storm limited landings. We modeled retail margins based on last quarter’s average ex-vessel price for cod.
FIFO (First-In, First-Out)
An inventory rotation method where older stock is sold before newer arrivals to maintain freshness and reduce waste.
Apply strict FIFO in the cold room to minimize spoilage. The new labels make FIFO much easier during weekend rushes.
Fillet Yield
The percentage of usable fillet weight relative to the whole (or dressed) fish weight; a key profitability metric.
At 38% fillet yield, we need a better cut plan or a lower buy price. Switching to smaller salmon bumped fillet yield but increased pin-bone labor.
HACCP (Hazard Analysis and Critical Control Points)
A preventive food safety system that identifies hazards and establishes controls, monitoring, and verification to ensure safe seafood production.
Our HACCP reassessment added a receiving CCP for histamine species. The auditor requested records for all HACCP monitoring and verification activities.
Harvest Tag (Shellstock Tag)
Mandatory identification tag for bivalve shellfish indicating harvester, harvest area, date, and dealer. Must accompany shellstock through distribution and be retained for recordkeeping.
Keep oyster tags attached through retail display and file them for 90 days. The batch was missing harvest area and date on the tag—reject on receipt.
Histamine
A biogenic amine formed in certain species (e.g., tuna, mackerel) when temperature control fails; causes scombroid poisoning and is subject to regulatory limits.
Reject tuna that arrives warm—histamine formation can’t be reversed by chilling. The lab flagged one lot above the jurisdiction’s histamine limit; we scrapped the batch.
Ice-to-Fish Ratio
Recommended proportion of ice to product weight to maintain target temperatures during storage and transport, commonly around 1:1 for fresh fish.
For long hauls, target a 1:1 ice-to-fish ratio by weight. We added more slurry ice to hit the required ratio for the weekend shipments.
Ike Jime
A harvesting technique involving rapid brain spiking, thorough bleeding, and spinal cord destruction to preserve flesh quality and extend shelf life.
The ike jime yellowtail shows firmer texture and longer shelf life. Train the crew to spike, bleed, and wire the spine quickly for best results.
IQF (Individually Quick Frozen)
A freezing method that freezes each piece separately (often via blast or cryogenic systems), improving handling, portioning, and quality retention.
Switch to IQF cod portions for better portion control and reduced drip loss. The IQF scallops thawed evenly and were easy to portion for service.
IUU Fishing (Illegal, Unreported, Unregulated)
Fishing activities that violate laws, go unreported, or occur in areas without effective management, undermining sustainability and legal supply chains.
Our sourcing policy excludes IUU risk fisheries without credible FIPs or certifications. The importer needs to provide documentation to demonstrate low IUU risk.
Listeria monocytogenes
A pathogen of concern in ready-to-eat seafood (e.g., smoked fish) that can grow at refrigeration temperatures; strict sanitation and environmental monitoring are required.
We monitor Listeria in the RTE smoked salmon room using environmental swabs. Extend shelf life only if Listeria controls are validated for low-temperature growth.
Lot Code (Batch Code)
A unique identifier assigned to a production batch to enable traceability, recall, and inventory control across the supply chain.
Affix the lot code to every case for recall readiness. We traced the complaint back to lot 24-0912 and quarantined the remaining cartons.
MAP (Modified Atmosphere Packaging)
Packaging that alters the gas composition around the product (e.g., CO2, N2, O2) to slow spoilage and extend shelf life, with strict temperature control.
Use CO2/N2 MAP for fresh fillets but maintain temps near 0–2°C to control C. botulinum risk. Switch MAP specs to 60% CO2 to reduce drip loss on cod.
Melanosis (Black Spot)
A harmless but unsightly enzymatic browning on crustaceans post-harvest, often managed with sulfites or alternatives like 4-hexylresorcinol and proper icing.
Treat head-on shrimp with approved inhibitors to limit melanosis. We rejected the prawns showing severe black spot despite their cold temperature on arrival.
Methylmercury
A toxic form of mercury that bioaccumulates in higher-trophic fish (e.g., shark, swordfish, some tunas). Consumer advisories and species selection help manage risk.
Advise pregnant customers to limit intake of high-mercury species like swordfish. We curated a low-mercury kids’ selection featuring salmon and sardines.
MSC (Marine Stewardship Council)
A leading certification for sustainably managed wild fisheries, with Chain of Custody to ensure labeled products truly originate from certified fisheries.
This cod is MSC certified; display the blue label and CoC number. We’re shifting to MSC pollock for our whitefish line to meet corporate targets.
Organoleptic Assessment
Sensory evaluation (sight, smell, touch, taste where appropriate) used to judge freshness and quality of seafood.
Train staff to assess odor, gill color, eye clarity, and flesh firmness daily. The organoleptic score flagged early spoilage in the hake before odor developed.
Parasite Destruction Freezing
Required freezing regimes to inactivate parasites in fish intended for raw or undercooked consumption (e.g., −20°C for 7 days or −35°C for 15 hours, jurisdiction dependent).
For raw salmon service, freeze to regulatory specs before retailing as sushi-grade. Keep freezer logs showing −20°C for 7 days to meet parasite control rules.
Pin Bones
Small, thin bones in certain fillets (e.g., salmon) that require manual or mechanical removal for boneless products.
Allocate extra labor for pin-boning large salmon fillets. Consider J-cut to remove the pin-bone line and reduce complaints.
PSP (Paralytic Shellfish Poisoning)
A foodborne illness from algal toxins (saxitoxins) accumulated in bivalves; triggers harvest area closures and testing requirements.
The bay is closed due to PSP; pull all wild mussels from sale. Verify the shellfish testing reports for saxitoxin before receiving the lot.
QIM (Quality Index Method)
A standardized freshness scoring system using species-specific sensory attributes to estimate remaining shelf life and compare lots objectively.
Apply the species-specific QIM sheet for cod during receiving. The lot scored 6 on QIM, so we priced it for quick sale.
Reefer (Refrigerated Transport)
Refrigerated trucks or containers used to transport chilled or frozen seafood while maintaining the cold chain.
Pre-cool the reefer container and verify data logger placement. The reefer unit alarmed overnight—check the pulp temperatures before acceptance.
Rigor Mortis
Post-mortem muscle stiffening. Timing of processing relative to rigor affects texture, gaping, and shelf life.
Don’t fillet pre-rigor tuna intended for top sashimi—it can lead to gaping. We held the catch on ice to pass through rigor before processing.
Sashimi-Grade
A marketing term indicating fish suitable for raw consumption based on handling, temperature control, and parasite management; not a formally regulated grade in many markets.
Label as sashimi-grade only if parasite control and handling standards are met. Customers expect premium texture from sashimi-grade yellowtail.
Seafood Watch Ratings
Consumer-facing sustainability ratings (Best Choice, Good Alternative, Avoid) by Monterey Bay Aquarium’s Seafood Watch to guide responsible purchasing.
We swapped from Avoid to Best Choice rockfish via an MSC-certified fishery. Our menu icons reflect Seafood Watch Good Alternative selections.
Shelf Life
The time a product remains safe and acceptable in quality under specified storage conditions; influenced by species, handling, packaging, and temperature.
With proper icing, we estimate a 5–7 day shelf life on this cod. MAP extended shelf life by two days, but we kept display temps near 0–2°C.
Size Grading
Sorting seafood into standardized size categories (by weight or count) to ensure consistent portioning, pricing, and presentation.
Order 2–3 lb whole branzino for consistent case presentation. The lack of size grading caused uneven portions and pricing confusion.
Slurry Ice
A pumpable mixture of micro-crystalline ice and water that cools product rapidly and conforms to surfaces, improving chilling efficiency.
Use slurry ice on deck to cool fish rapidly and uniformly. We switched from flake ice to slurry for better core temperature control on long trips.
SSOP (Sanitation Standard Operating Procedures)
Documented cleaning and sanitation procedures that support HACCP by controlling environmental and cross-contamination risks.
Update the SSOP to include nightly ATP swabbing at the fillet table. The inspector reviewed our SSOP records alongside the HACCP plan.
TAC (Total Allowable Catch)
The scientifically informed catch limit for a fish stock over a set period, often allocated among fleets or permits to manage sustainability.
The TAC cut tightened supply, raising ex-vessel prices. We forecasted retail costs based on the new TAC for pollock.
Traceability
The ability to track seafood through all stages of production, processing, and distribution, enabling recalls, fraud prevention, and sustainability claims.
Scan the GS1 barcode to pull the full traceability record for this lot. Our blockchain pilot lets customers trace their fish back to the vessel.
Trawl
A fishing method where a net is towed behind a vessel (bottom or midwater). Efficient but often scrutinized for habitat impact and bycatch.
This bottom trawl fishery uses bycatch reduction devices and area closures. The trawl-caught cod had lower fat content than longline, affecting texture.
TTI (Time-Temperature Indicator)
Smart labels or devices that change color/state to indicate cumulative time–temperature exposure, helping verify cold chain integrity.
Place TTIs on high-value chilled shipments for visibility into temperature abuse. The TTI showed cumulative exposure above spec; we rejected the pallet.
Value-Added
Processing that increases product value beyond raw form, such as pin-boning, portioning, marinating, breading, or ready-to-cook kits.
Launch value-added salmon—pin-boned, portioned, and marinated—for higher margins. Our value-added crab cakes help reduce trim waste and stabilize costs.
Vibrio vulnificus/parahaemolyticus
Naturally occurring bacteria in warm marine waters that can cause illness from raw or undercooked seafood, especially oysters; managed via time–temperature controls and advisories.
Enforce harvest temp controls and rapid icing to mitigate Vibrio risk in oysters. We posted consumer advisories for raw oyster service during warm months.
Wet Storage
Holding live seafood (e.g., lobsters, clams) in tanks with controlled water quality prior to sale; not a substitute for depuration for shellfish.
Maintain water quality logs and turnover rates for wet-stored lobsters. Limit wet storage duration to prevent off-flavors and mortality.
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