A residual catch-all for frozen Salmonidae fillets that are neither Pacific salmon (classified separately) nor Atlantic Salmo salar, this line may capture species such as Danube salmon (huchen), Arctic char, or other salmonid varieties not enumerated elsewhere. Because the line is defined by exclusion, correct classification depends on confirming that the species does not qualify for a more specific line. FDA prior notice and FSIS reinspection requirements apply to all imported fish fillets.

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