0309.90.50

Analysis

HTS 0309.90.50 covers of molluscs: frozen under heading 0309 (flours, meals and pellets of fish, crustaceans, molluscs and other aquatic invertebrates…). US Customs collects import statistics for it under 2 ten-digit suffixes, reported in .

For statistics it divides in two: 0309.90.50.30 for conch and 0309.90.50.90 for other. Both pay the same duty; the suffix records which kind was imported.

There is no general-rate duty on this line, which puts it with roughly 86% of the 272 tariff lines in chapter 03 that are also free. Free here means free of the base duty only: origin-specific Chapter 99 duties such as Section 301 can still be owed.

Census statistics map these goods to NAICS 114112 (Shellfish Fishing), an industry of 940 US establishments employing 1,604 people, the industry a domestic producer of these goods reports under.

All 6 neighbouring lines carry the same duty-free rate, so a borderline choice between them changes the statistics reported, not the duty paid.

Every edition we compared, from Jan 2023 to Oct 2026 (Rev. 22), shows the same general rate of Free.