Rock sole (Pleuronectes bilineatus) is a North Pacific flatfish harvested primarily in Alaskan and adjacent waters, and its dedicated 10-digit HTS line reflects the species' commercial significance in frozen whole-fish trade. The scientific name in the long description — Pleuronectes bilineatus — is the controlling classification criterion; importers must ensure supplier documentation confirms this species rather than a related flatfish that would fall under the NESOI provisions. FDA admissibility requirements, including prior notice and HACCP documentation, apply to all frozen seafood imports. Consult a licensed customs broker or FDA compliance specialist before entry.

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