1604.18 - Shark fins:

This HTS category, 1604.18, specifically addresses shark fins that have been prepared or preserved. This classification falls under the broader heading of prepared or preserved fish, which includes a variety of aquatic life processed for consumption.

Unlike its sibling categories which differentiate based on specific types of fish such as salmon (1604.11), herrings (1604.12), sardines (1604.13), tuna (1604.14), and mackerel (1604.15), this code isolates shark fins. The distinguishing factor here is the species of aquatic invertebrate, the shark, and the specific preparation of its fins for commercial use, often for consumption in soups and other dishes.

The subcategories under 1604.18 further refine the classification based on the method of preservation. 1604.18.10.00 covers shark fins packed in airtight containers, typically signifying canning or similar sealing methods to ensure shelf-stability. The residual category, 1604.18.90.00, encompasses all other preparations of shark fins not specifically covered by the airtight container criterion, potentially including dried, salted, or other non-hermetically sealed forms.