1605.10.20.51 - Callinectes spp., including blue crabs (C. sapidus)

This HTS code, 1605.10.20.51, specifically classifies swimming crabs of the family Portunidae, such as the common blue crab ( *Callinectes sapidus*), that are prepared or preserved and presented in airtight containers. This designation applies to various forms of these swimming crabs, including whole, pieces, or paste, provided they are sealed in a manner that prevents air and moisture exchange, ensuring preservation.

The primary distinction for this category lies in the genus and family of crab. While the parent category 1605.10.20 encompasses "Crabmeat," this subcategory narrows the scope to only swimming crabs within the Portunidae family. This differentiates it from other crab species or preparations that might fall under sibling category 1605.10.20.59, which would cover other types of crabs or crab preparations not specifically identified as swimming crabs in airtight containers.

As a leaf node, this classification does not have further subcategories. Therefore, the classification hinges on the precise identification of the crab species as a member of the Portunidae family and its packaging in airtight containers. This ensures accurate duty and trade reporting for these specific aquatic invertebrate preparations.