Code 0303120062 is a residual 'not elsewhere specified or included' (NESOI) provision. It applies only to frozen Pacific salmon species not covered by the dedicated lines — specifically Oncorhynchus masou (masu/cherry salmon) and Oncorhynchus rhodurus (amago salmon). If the species is sockeye, chinook, chum, pink, or coho, the corresponding species-specific code must be used instead.

Masu and amago salmon are culturally significant in Japan and are consumed in specialty Japanese cuisine. US import volumes under this line are modest, and demand is concentrated among Japanese-cuisine restaurants, specialty Asian grocery retailers, and ethnic food distributors. Supply originates primarily from Pacific Rim fisheries and aquaculture operations.