Under 030822, both frozen sea urchin roe and frozen whole sea urchins (excluding flours, meals, and pellets) fall under the single 10-digit line 0308220000. However, commercial invoices should still specify whether the product is roe or whole animal, as this distinction may be relevant for FDA labeling requirements and buyer specifications.

Frozen uni is commercially graded by color (ranging from pale yellow to deep gold), texture, and bitterness level, with Japanese-market grades (such as 'A' or premium tray-pack) commanding significant price premiums. Importers should specify grade, species, and processing method (e.g., alum-treated vs. non-alum) in purchase contracts, as these factors affect both value and FDA labeling compliance for ingredient disclosure.