Harmonized System
U.S. imports of Prepared or Preserved Molluscs (Not Elsewhere Specified) (HS 160559) totaled $507K in August 2026, imported from 16 countries.
Importers of Prepared or Preserved Molluscs (Not Elsewhere Specified) paid $70K in duties in August 2026, an average duty rate of 13.80% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Prepared or Preserved Molluscs (Not Elsewhere Specified) imports of $507K in August 2026 ran 26% above the year-to-date monthly average of $404K.
Last updated: August 2026 dataServing as the catch-all for prepared and preserved molluscs not covered by the more specific headings for oysters, mussels, scallops, clams, abalone, octopus, squid, or snails, this residual heading captures a diverse range of specialty shellfish products. Thailand and Vietnam lead US supply, with China also a significant source — and goods of Chinese origin may be subject to Section 301 tariffs. The schedule distinguishes composite products containing fish meat or prepared meals (1605590500) from straight mollusc preparations (1605590000 / 1605596000). Correct classification requires confirming that the specific mollusc species is not more precisely described under another heading in Chapter 16. FDA prior notice and HACCP compliance are required; consult a licensed customs broker to confirm the appropriate tariff line.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
16 import shipments a month
Chapter 16 contains dedicated headings for oysters, mussels, scallops, clams, cockles, arkshells, abalone, octopus, squid, cuttlefish, and snails. If the mollusc species is covered by one of those specific headings, it must be classified there rather than under the residual 160559 heading. Only species not described elsewhere — such as certain whelks, periwinkles, or lesser-traded bivalves — properly fall here.
Line 1605590500 applies when the preparation contains fish meat in addition to mollusc, or constitutes a prepared meal. This distinction affects not only classification but potentially the applicable duty rate. Importers of mixed seafood products or ready-to-eat preparations should have their product formulation reviewed to determine whether the fish-meat line or the straight mollusc line is correct.
Subheading 15 of 18 in heading 1605
Subheading 160559 · $507K of $310.9M
ImportsExports
Imports
$507KYoY · free account
Exports
$42KYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $6.1M of Prepared or Preserved Molluscs (Not Elsewhere Specified) and exported $402K.
Through August 2026. Source: U.S. Census Bureau.
Trade Directory
List your company under HS 160559 — Prepared or Preserved Molluscs (Not Elsewhere Specified), so the companies trading it can find you. Be the first supplier listed.
HS10 import codes under this HS6 parent, each with its own page. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Imports for consumption | Average duty rate | Dutiable Share | Duty Collected |
|---|---|---|---|---|---|
| 1605596000 | Molluscs, Prepared or Preserved, NESOI | $406K | 14.13% | 66.47% | $57K |
| 1605590500 | Molluscs Products With Fish Meat; Prep Meals, NESOI | $101K | 12.50% | 100.00% | $13K |
HS10 export codes under this HS6 parent, each with its own page. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 1605590000 | Molluscs, Prepared or Preserved, NESOI | $42K |
Import lines come from the U.S. Harmonized Tariff Schedule and export lines from Schedule B. The two are numbered by different agencies, so the same 10-digit code can appear in both tables describing a different product.
Imports · August 2026
origin
Thailand and Mexico together supply 56% of it. China pays 37.5% duty; Mexico 0.0%.
customs district
destination
entry
rate provision · imports
26.9% enters free of duty; duty collected equals 13.80% of imports for consumption.