Frozen Mackerel (Scomber Species)

Three Scomber species — Atlantic mackerel (S. scombrus), Pacific mackerel (S. japonicus), and blue mackerel (S. australasicus) — are consolidated under this heading, making species identification on commercial documentation critical for downstream buyers who specify particular fat content or texture profiles. Norway and Iceland dominate US imports, reflecting the North Atlantic mackerel fishery's scale and their well-developed freezing and export infrastructure. The single US tariff line 0303540000 covers whole frozen fish, explicitly excluding fillets, livers, and roes, which classify elsewhere. FDA seafood HACCP requirements apply, and importers should confirm that foreign establishments hold current FDA registration.