0303.39.01.30 - Yellowfin sole (Pleuronectes asper)

This HTS classification pertains to frozen yellowfin sole (scientific name: *Pleuronectes asper*). As a subcategory within "Other flat fish," it specifically identifies this distinct species of flatfish, separate from other commonly classified varieties. The "0303.39" heading generally covers frozen flat fish, and this particular code, 0303.39.01.30, isolates yellowfin sole from other flatfish that might be classified under sibling categories.

Distinguishing this category from its siblings is crucial for accurate classification. For instance, while 0303.39.01.10 covers "Flounder" and 0303.39.01.20 is designated for "Rock sole (*Pleuronectes bilineatus*)," this code is exclusively for yellowfin sole. The "Other" designation at this level signifies that the yellowfin sole is a specific type of flatfish not otherwise enumerated within the immediate preceding codes. Therefore, identification relies on recognizing the species *Pleuronectes asper*.

As this is a leaf node within the HTS, there are no further subcategories. Classification under 0303.39.01.30 is final for frozen yellowfin sole. Importers and exporters must ensure that the product precisely matches the species description to avoid misclassification and potential customs issues. The focus remains on the frozen state and the specific species of flatfish.