1605.56.10.00 - Razor clams (Siliqua patula)

This HTS classification, 1605.56.10.00, specifically designates razor clams, identified scientifically as *Siliqua patula*, when they are prepared or preserved and packed in airtight containers. This category falls under the broader heading for molluscs, which are distinct from crustaceans and other aquatic invertebrates. The crucial differentiating factor for inclusion here is the preservation method, requiring the product to be sealed within an airtight container, such as cans or vacuum-sealed pouches, to ensure shelf stability and prevent spoilage.

The "In airtight containers" specification serves to distinguish these razor clams from other preparations of molluscs. For instance, other subcategories within molluscs might include goods that are frozen, chilled, dried, or preserved in brine or oil but not hermetically sealed. It is important to note that the term "razor clams" here refers specifically to the *Siliqua patula* species, as other types of clams or molluscs prepared and packed in airtight containers would be classified elsewhere under Chapter 16, depending on their specific species and further preparation.

As this is a leaf node in the HTS database, there are no further subdivisions for this specific classification. Therefore, classification under 1605.56.10.00 is definitive once the product is identified as *Siliqua patula*, prepared or preserved, and presented in an airtight container. This ensures accurate tariff application for international trade of this particular seafood product.