Country of origin for seafood is generally determined by where the fish was harvested, not where it was processed or frozen. Octopus caught in Moroccan waters and processed in Spain would typically be declared as originating in Morocco. Importers should obtain documentation from the Spanish exporter confirming the catch origin, as misdeclaring origin can result in penalties and potential trade-remedy liability.

Quality distinctions such as size (weight per piece), skin-on versus skin-off, and blanched versus raw frozen significantly affect commercial pricing and buyer specifications, but the HTS does not subdivide frozen octopus by grade — all forms fall under 0307520000. Grade and specification details belong in the commercial invoice and purchase contract rather than the tariff classification, though they may be relevant to FDA labeling and net-weight declarations.