Classification
Product TypeRaw Material
Product FormFrozen
Industry PositionPrimary Fishery Product
Raw Material
Commodity GroupMarine finfish (Filefishes/Leatherjackets — Monacanthidae)
Scientific NameThamnaconus modestus
PerishabilityHigh (fresh); managed via deep-frozen handling for frozen trade presentations
Growing Conditions- Marine habitat; Northwest Pacific distribution reported from Hokkaido, Japan to the Ryukyu Islands, also East and South China seas
- Reported depth range around 50–110 m for Thamnaconus modestus (FishBase)
- Temperature range reported around 10–28°C for Thamnaconus modestus (FishBase)
Main VarietiesMonacanthidae (filefishes/leatherjackets) marketed under common names; Northwest Pacific trade may include black scraper (Thamnaconus modestus)
Consumption Forms- Thawed and cooked as whole fish
- Thawed and portioned/filleted for foodservice or retail preparation
Grading Factors- Species identification and traceability clarity (common name vs. scientific name where applicable)
- Presentation conformity (uneviscerated vs. eviscerated; head-on vs. headless) as declared
- Frozen quality defects (deep dehydration/freezer burn, oxidation-related defects)
- Glaze use and net weight conformity where glazed
Market
Frozen whole leatherjacket fish is a globally traded frozen finfish product typically sold as whole fish (uneviscerated or eviscerated), sometimes with glaze, and marketed using common names that can vary by country and species. In many markets, “leatherjacket” refers to filefishes (family Monacanthidae); one commercially relevant Northwest Pacific species is the black scraper (Thamnaconus modestus), reported from Japan through the East and South China seas and associated with both fisheries and aquaculture. Supply for Northwest Pacific “leatherjacket/filefish” trade is geographically concentrated, increasing exposure to regional stock variability and management actions. Market access and price realization are strongly influenced by cold-chain integrity (deep-frozen handling) and clear species identification and labeling in trade documentation.
Market GrowthNot Mentioned
Major Producing Countries- 일본Northwest Pacific origin; aquaculture and fisheries supply are reported for black scraper/filefish trade in regional markets.
- 대한민국Northwest Pacific origin; scientific literature reports commercial relevance and aquaculture interest for black scraper (Thamnaconus modestus).
- 중국Northwest Pacific/East China Sea vicinity is within reported distribution for black scraper/filefish marketed as “leatherjacket” in some trade channels.
Specification
Major VarietiesFilefishes/Leatherjackets (Monacanthidae) — product naming can be species-specific by market; a Northwest Pacific traded species is Thamnaconus modestus (black scraper)
Physical Attributes- Laterally compressed whole-fish presentation typical of filefishes/leatherjackets (Monacanthidae)
- Frozen whole finfish may be presented head-on or headless; may be uneviscerated or eviscerated depending on buyer specification
Grades- Codex CXS 36-1981 applies to quick frozen finfish (uneviscerated/eviscerated) and is commonly used as a reference for quality, hygiene, and labeling expectations in trade specifications
Packaging- Glazed presentations are used in some supply chains; where glazed, net contents declarations should be exclusive of the glaze (per Codex CXS 36-1981)
- Trade documentation commonly specifies presentation (eviscerated vs. uneviscerated; head-on vs. headless) and storage instructions consistent with deep-frozen distribution
ProcessingQuick-freezing expectations: product temperature reaches -18°C or colder at the thermal centre after stabilization; maintained deep frozen through transport, storage, and distribution (Codex CXS 36-1981)If glaze is applied, water quality requirements and glaze disclosure expectations apply (Codex CXS 36-1981)
Supply Chain
Value Chain- Harvest/catch (or farm harvest) -> landing/receiving -> washing and sorting -> optional evisceration and trimming -> quick freezing -> optional glazing -> packaging and labeling -> deep-frozen storage -> refrigerated (reefer) transport -> importer cold store -> wholesale/processing/retail
Temperature- Maintain deep-frozen conditions across storage and distribution; Codex quick-frozen finfish labeling guidance includes storage at -18°C or colder
- Quality defects associated with frozen fish (e.g., deep dehydration/freezer burn) are a key buyer concern for frozen whole presentations
Risks
Supply Concentration HighFor leatherjacket/filefish products associated with Northwest Pacific species (e.g., black scraper Thamnaconus modestus), the supply base is geographically concentrated (Japan–East/South China seas–Korean Peninsula). This concentration amplifies disruption risk from regional stock variability, management measures, or environmental shocks, and can tighten availability for buyers relying on a small set of origins.Qualify multiple approved origins and suppliers; define acceptable alternate Monacanthidae species (or size/presentation substitutes) with pre-agreed labeling; use forward contracts and cold-store buffers where feasible.
Traceability And Labeling High“Leatherjacket” is a common-name label used for filefishes (Monacanthidae) and can be applied to different species across markets. Ambiguous naming increases risk of species substitution, documentation errors, and border or customer rejections if presentation (eviscerated/headless) and glaze statements are not clearly declared or if species identification is unclear.Specify scientific name on contracts and certificates where allowed; align product name and presentation descriptors to Codex CXS 36-1981 labeling expectations; implement supplier traceability controls and (where warranted) periodic species verification testing.
Cold Chain Integrity MediumFrozen whole finfish quality depends on continuous deep-frozen handling; temperature abuse can drive dehydration/freezer burn and sensory defects, reducing grade-outs and claims risk. Codex quick-frozen finfish guidance emphasizes deep-frozen distribution and labeling for storage at -18°C or colder.Use validated freezing and storage controls, reefer temperature monitoring, and clear handling instructions; manage glazing/packaging to minimize dehydration and oxidation.
Sustainability- Geographic supply concentration for Northwest Pacific leatherjacket/filefish trade increases exposure to localized stock variability and fisheries management actions
- Illegal, unreported and unregulated (IUU) fishing risk is a cross-cutting global seafood trade concern that can affect traceability and market access
- Overfishing and coastal habitat pressures have been cited in scientific literature as contributors to declines for some regionally important filefish/“leatherjacket” fisheries
Labor & Social- Forced labor risk in commercial fishing is a documented global concern; buyers increasingly require social compliance and vessel-level transparency
- Seafood supply chains may face heightened due-diligence scrutiny in jurisdictions and products linked in public reporting to forced labor risks (even when the specific species is not uniquely implicated)
FAQ
What species does “leatherjacket fish” refer to in global seafood trade?“Leatherjacket” is a common name used for filefishes in the family Monacanthidae, and the exact species can vary by market. In Northwest Pacific trade contexts, one commercially relevant species is the black scraper (Thamnaconus modestus), so buyers often reduce risk by specifying the scientific name in procurement documents.
What storage temperature is expected for frozen whole leatherjacket fish during transport and storage?For quick frozen finfish, Codex guidance indicates the product should be stored at -18°C or colder and maintained deep frozen through transportation, storage, and distribution. Buyers commonly align cold-chain requirements for frozen whole leatherjacket/filefish shipments with this -18°C-or-colder expectation.
What labeling or documentation details help avoid disputes for glazed or processed whole-fish presentations?Codex quick frozen finfish guidance highlights declaring the species’ common/usual name and, for eviscerated fish, indicating whether it is eviscerated and whether it is head-on or headless. If the product is glazed, Codex also notes that net contents declarations should exclude the glaze and that a glaze statement should be made where applicable.