HS code · 6-digit subheading

HS Code 0303.39 – Fish; frozen, flat fish, n.e.c. in item no. 0303.3, excluding fillets, fish meat of 0304, and edible fish offal of subheadings 0303.91 to 0303.99

HS code 0303.39 is the 6-digit subheading for fish, frozen, flat fish, n.e.c. in item no. 0303.3, excluding fillets, fish meat of 0304, and edible fish offal of subheadings 0303.91 to 0303.99. It is used for whole frozen flounder, whole frozen dab, whole frozen brill, whole frozen witch flounder and whole frozen yellowfin sole.

What HS 0303.39 covers

This HS code serves as a 'basket' category for frozen flatfish not elsewhere specified in subheadings 0303.31 to 0303.34, excluding fillets, fish meat, or edible offal. It encompasses a diverse array of flatfish species, reflecting the broad scope of global seafood trade beyond the most common varieties. Importers and exporters dealing with this code handle a wide range of species, often driven by regional availability, specific culinary traditions, or niche market demands. This category is crucial for classifying less common or regionally specific flatfish that are traded in their whole, frozen form. Understanding the specific species within a shipment is vital for both trade compliance and market analysis.

Covers
  • Whole frozen flounder
  • Whole frozen dab
  • Whole frozen brill
  • Whole frozen witch flounder
  • Whole frozen yellowfin sole
  • Whole frozen plaice (other than Pleuronectes platessa)
Examples
  • Ocean's Catch Frozen Flounder
  • Seafood Market Frozen Dab
  • Generic Frozen Flatfish Mix

Codes often confused with 0303.39

Common mistake. This code is often a point of confusion, as specific flatfish might be incorrectly classified here instead of their dedicated codes (e.g., 0303.31-0303.34) or vice-versa. It's also distinct from fresh flatfish (0302.29) or flatfish fillets (0304.79).

0303.31Fish; frozen, halibut (Reinhardtius hippoglossoides, Hippoglossus hippoglossus, Hippoglossus stenolepis), excluding fillets, fish meat of 0304, and edible fish offal of subheadings 0303.91 to 0303.990303.34Fish; frozen, turbots (Psetta maxima, Scophthalmidae), excluding fillets, fish meat of 0304, and edible fish offal of subheadings 0303.91 to 0303.990302.29Fish; fresh or chilled, flat fish, n.e.c. in item no. 0302.2, excluding fillets, fish meat of 0304, and edible fish offal of subheadings 0302.91 to 0302.990304.79Fish fillets; frozen, of the families Bregmacerotidae, Euclichthyidae, Gadidae, Macrouridae, Melanonidae, Merlucciidae, Moridae and Muraenolepididae other than cod, haddock, coalfish, hake, and Alaska pollock

Top exporters and importers of HS code 030339, 2025

In 2025, the largest exporter of HS code 030339 in UN Comtrade data was the United States, with 45% of world exports; the largest importer in UN Comtrade data was China, with 52% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.

Top exporters 2025 · share of world exports

  1. 1 United States $158M
  2. 2 Russia* ~$69M
  3. 3 China $40M

World total: $349M Reported figures on UN Comtrade ↗

Top importers 2025 · share of world imports

  1. 1 China $203M
  2. 2 South Korea $58M
  3. 3 Spain $25M

World total: $390M Reported figures on UN Comtrade ↗

How these figures are built

109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries marked * did not, so their figures add up what other countries recorded trading with them, and their exports are valued at buyers' CIF prices. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).

Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.

Brazil NCM code for 0303.39

Brazil does not split HS 0303.39: its NCM code is 0303.39.00.

  1. 0303.39.00 Other frozen flat fishOutros

All Brazil NCM codes in heading 03.03 →

Source: Siscomex NCM table, updated Oct 2026. The Portuguese text is official; the English is our translation.

Questions about HS 0303.39

What is HS code 030339?

HS code 030339 is a 6-digit subheading in the Harmonized System that covers: Fish; frozen, flat fish, n.e.c. in item no. 0303.3, excluding fillets, fish meat of 0304, and edible fish offal of subheadings 0303.91 to 0303.99. This HS code serves as a 'basket' category for frozen flatfish not elsewhere specified in subheadings 0303.31 to 0303.34, excluding fillets, fish meat, or edible offal. It encompasses a diverse array of flatfish species, reflecting the broad scope of global seafood trade beyond the most common varieties. Importers and exporters dealing with this code handle a wide range of species, often driven by regional availability, specific culinary traditions, or niche market demands. This category is crucial for classifying less common or regionally specific flatfish that are traded in their whole, frozen form. Understanding the specific species within a shipment is vital for both trade compliance and market analysis.

What products fall under HS code 030339?

Whole frozen flounder, whole frozen dab, whole frozen brill, whole frozen witch flounder, whole frozen yellowfin sole, whole frozen plaice (other than Pleuronectes platessa)

What are common misclassifications for HS code 030339?

This code is often a point of confusion, as specific flatfish might be incorrectly classified here instead of their dedicated codes (e.g., 0303.31-0303.34) or vice-versa. It's also distinct from fresh flatfish (0302.29) or flatfish fillets (0304.79).

Which countries are the top exporters of goods under HS code 030339?

In 2025, the top exporters of HS code 030339 in UN Comtrade data were the United States ($158M, 45% of world exports), Russia (about $69M) and China ($40M). World exports came to about $349M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

Which countries are the top importers of goods under HS code 030339?

In 2025, the top importers of HS code 030339 in UN Comtrade data were China ($203M, 52% of world imports), South Korea ($58M) and Spain ($25M). World imports came to about $390M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.

How is HS code 030339 structured?

HS code 030339 is a 6-digit subheading under the Harmonized System. The first 2 digits (03) identify the chapter, digits 3-4 (03) identify the heading, and digits 5-6 (39) specify the subheading. This code is standardized globally by the World Customs Organization.

What is the Brazil NCM code for HS code 030339?

In Brazil, HS code 030339 is NCM 0303.39.00. The last two digits are 00 because Brazil does not split this HS code further.