Prepared or Preserved Mackerel, Whole or in Pieces (Not Minced)

Prepared and preserved mackerel — a widely traded oily fish valued in both retail and food-service channels — is classified under a single 10-digit line (1604150000) at the US level, simplifying entry documentation compared to more granularly subdivided fish headings. Thailand and Poland lead US imports, with Vietnam, Chile, and Japan rounding out the top supplier group. FDA seafood HACCP requirements apply to all imported preserved fish, and importers should ensure foreign processing facilities are registered and maintain compliant HACCP plans. The relatively straightforward single-line structure means that classification disputes typically center on species identity — distinguishing true mackerel from related species that may fall under different headings.