0309.90.10

Analysis

HTS 0309.90.10 covers of crustaceans: frozen under heading 0309 (flours, meals and pellets of fish, crustaceans, molluscs and other aquatic invertebrates…). US Customs collects import statistics for it under 3 ten-digit suffixes, reported in .

The normal trade relations rate here is zero, shared by about 86% of the 272 tariff lines in chapter 03, a useful check when a neighbouring dutiable line is a candidate. 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. That concordance is how imports of this line are compared with US output.

The ten-digit suffixes separate freshwater crawfish and antarctic krill. The duty is the same across them; the suffix matters for statistics, licensing and some quotas, and an entry needs all ten digits.

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