Classification
Product TypeRaw Material
Product FormFrozen
Industry PositionPrimary Aquatic Product
Raw Material
Commodity GroupBivalve molluscs (clams; includes surf clams within HS clams categories)
Scientific NameSpisula solidissima; Mactromeris polynyma; Mactra veneriformis; Pseudocardium sachalinense
PerishabilityLow (when maintained frozen); High if thawed/temperature-abused
Growing Conditions- Marine coastal waters in temperate regions
- Sandy to gravelly seabeds (burrowing bivalves)
- Continental shelf and bank habitats depending on species and life stage
Main VarietiesAtlantic surfclam, Arctic surf clam / Stimpson’s surfclam, Surf clam (Mactra veneriformis), Sakhalin/Japanese surf clam (Pseudocardium sachalinense)
Consumption Forms- Frozen shucked clam meat for foodservice and further processing
- Prepared foods such as soups, chowders, and stews
- Value-added products (e.g., clam strips/breaded items and canned clam products in some markets)
Grading Factors- Species identification and labeling integrity (multi-species ‘surf clam’ market term risk)
- Size grading and cut style (whole/strips/pieces)
- Cleanliness (sand/grit) and shell-fragment control
- Compliance with microbiological and biotoxin requirements for bivalves
- Declared net weight and ice/glaze management where glazing is used
Market
Frozen surf clam is a globally traded bivalve product typically sold as processed (shucked and frozen) clam meat rather than live shellfish, and it commonly moves in international trade under the broader “frozen clams” customs category. Supply is multi-species and origin-dependent, with notable wild-capture fisheries including U.S. Atlantic surfclam (Spisula solidissima) and Canadian Arctic surf clam (Mactromeris polynyma), alongside Asian surf-clam resources and production (e.g., Mactra veneriformis and Pseudocardium sachalinense). Demand is shaped by foodservice and processing uses (soups/chowders, prepared clam products) and by specialized culinary segments in Asia for surf-clam items. Trade and market access are strongly conditioned by bivalve sanitation controls, including monitoring for microbiological contamination and algal biotoxins that can trigger harvest-area closures and shipment disruptions.
Major Producing Countries- 미국Only source of Atlantic surfclams (Spisula solidissima) and a major wild-capture producer; product availability described as year-round.
- 캐나다Major producer of Arctic surf clam (Mactromeris polynyma) from offshore and inshore fisheries (e.g., Gulf of St. Lawrence/Scotian Shelf context).
- 중국Surf clam (Mactra veneriformis) is described in peer-reviewed literature as a commercially important bivalve in China.
- 대한민국Peer-reviewed literature describes surf clam (Mactra veneriformis) as commercially important in Korea (alongside China and Japan).
- 일본Peer-reviewed literature references commercially important surf-clam fishing grounds for Pseudocardium sachalinense in Hokkaido; surf clam (Mactra veneriformis) is also described as commercially important in Japan.
Major Exporting Countries- 중국Dominant exporter in FAO GLOBEFISH’s 2014 analysis for the “clams, cockles and ark shells” trade segment (which includes surf clams within HS clams categories).
- 대한민국Second-largest supplier in FAO GLOBEFISH’s 2014 analysis for the “clams, cockles and ark shells” trade segment.
Major Importing Countries- 대한민국Identified by FAO GLOBEFISH as the leading importer in its 2014 “clams, cockles and ark shells” trade analysis.
- 일본Identified by FAO GLOBEFISH as one of the top importing markets for “clams, cockles and ark shells” and described as the largest buyer in early-2016 reporting for this segment.
Supply Calendar- United States (Atlantic surfclam):Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, DecMarket availability is described as year-round for U.S. Atlantic surfclams, enabled by managed commercial harvest and processing into frozen forms.
Specification
Major VarietiesAtlantic surfclam (Spisula solidissima), Arctic surf clam / Stimpson’s surfclam (Mactromeris polynyma), Surf clam (Mactra veneriformis), Sakhalin/Japanese surf clam (Pseudocardium sachalinense)
Physical Attributes- Typically traded as shucked meat that is processed (washed/cleaned) and frozen; may be sold as pieces (e.g., chopped/IQF) or in other processed presentations.
- Texture is often described as firm/chewy for Atlantic surfclam products.
Compositional Metrics- Bivalve sanitation compliance parameters commonly focus on microbiological safety and algal biotoxins (e.g., PSP/DSP/ASP), with monitoring and testing regimes influencing lot release and harvest-area access.
- Buyer specifications in frozen trade commonly include foreign-matter controls (e.g., shell fragments/sand) and declared net weight versus added ice/glaze where glazing is used.
Packaging- Bulk or foodservice packs of frozen shucked clam meat (cartons with inner poly bags).
- IQF or block-frozen formats are commonly used across frozen mollusc supply chains.
ProcessingFrequently sold processed rather than live, including frozen and canned forms; used as an ingredient in prepared foods (e.g., soups/chowders) and value-added items.
Supply Chain
Value Chain- Harvest (often dredge-based for key wild fisheries) -> landing -> shucking/meat recovery -> washing/cleaning -> freezing -> frozen storage -> refrigerated export logistics -> import inspection/clearance -> wholesale/foodservice or further processing.
Demand Drivers- Foodservice demand for consistent, ready-to-use frozen shellfish ingredients.
- Industrial and retail demand for processed clam products (e.g., soups/chowders and other prepared foods) supported by stable frozen supply.
- Asian culinary demand for surf-clam items in sushi/seafood presentations in some market segments.
Temperature- Continuous frozen cold-chain control is critical to prevent quality loss and food-safety risks associated with thaw/refreeze or temperature abuse.
- Sanitation controls are especially important for bivalves due to their ability to concentrate contaminants from growing waters.
Risks
Food Safety HighBivalve molluscs are filter feeders that can concentrate microbiological contaminants (e.g., enteric pathogens) and algal biotoxins; contamination events and harmful algal blooms can trigger harvest bans, product holds, and border rejections that rapidly disrupt supply and trade for frozen surf-clam products.Source from approved/monitored harvest areas; maintain HACCP-based controls aligned with Codex guidance; implement robust biotoxin and microbiological testing, lot traceability, and rapid recall capability.
Habitat Impacts MediumKey surf-clam fisheries can use bottom-contact dredges that disturb seabed habitat; habitat-impact concerns can lead to spatial closures, stricter gear requirements, and reputational/market-access pressures for buyers with ESG commitments.Prefer suppliers operating under science-based management (closed areas, monitoring, bycatch controls) and credible third-party programs where applicable; document gear type and habitat safeguards.
Climate MediumAtlantic surfclam is thermally sensitive, and warming bottom temperatures are associated with contractions in southern/inshore portions of the range and shifts toward deeper waters, creating uncertainty for future availability and cost structure in a major producing region.Diversify origin portfolios across species and regions; monitor stock assessments and environmental indicators; build flexibility into product specs to accommodate multi-origin sourcing.
Regulatory Compliance MediumShellfish trade is highly regulated, and compliance requirements (including protocols addressing paralytic shellfish poisoning and other hazards) can restrict where and when surf clams can be harvested and marketed internationally.Maintain documented compliance with importing-market shellfish sanitation requirements; verify harvest-area status and required testing protocols before shipment; strengthen supplier audit and documentation practices.
Sustainability- Bivalve sanitation and growing-water quality: microbiological contamination and algal biotoxins can force harvest-area closures and constrain supply availability.
- Seabed disturbance from bottom-contact dredging in offshore surf-clam fisheries, with immediate impacts on substrate and benthic organisms and ongoing scrutiny of habitat impacts.
- Climate sensitivity: warming bottom temperatures are linked to distribution shifts and management challenges for Atlantic surfclam in the Northwest Atlantic.
FAQ
What HS code commonly covers frozen clams (including surf clams) in global trade data?In HS 2017, frozen clams (including surf clams within the listed clam families) are covered under HS code 030772, described as “clams, cockles and ark shells … frozen.”
What are the most important food-safety risks for surf clams and other bivalve molluscs in international trade?Key risks include microbiological contamination from polluted growing waters (which can lead to illnesses such as gastroenteritis or hepatitis) and algal biotoxins that can cause shellfish poisonings such as PSP, DSP, NSP, ASP, AZP, and related hazards. These risks can trigger harvest closures, testing holds, and shipment disruptions.
Where do Atlantic surfclams in commercial supply come from?Commercial Atlantic surfclams (Spisula solidissima) are sourced from U.S. wild-caught fisheries on the U.S. Atlantic coast, and NOAA notes the United States as the only source for this species in the market.