Yes — frozen skipjack loins, which are a partially processed form between a whole fish and a fillet, are generally classified under heading 0304 rather than 0303430000, because they constitute 'other fish meat' within the meaning of heading 0304. Importers should confirm the exact processing state with their supplier and consult a customs broker, as the loin-versus-dressed-fish boundary is a recurring classification issue in the tuna trade.

Dolphin-safe labeling under the Marine Mammal Protection Act requires a written statement from the vessel captain (and, for certain ocean areas, an independent observer) certifying that no purse-seine net was intentionally deployed on or used to encircle dolphins during the trip. Importers should obtain this certification from the exporter and retain it as part of their import records, as NOAA Fisheries may audit compliance.