Shellfish

**Semantic type:** Food

**Definition:** Any aquatic invertebrate animal having a shell and belonging to the phylum Mollusca, the class Crustacea (phylum Arthropoda), or the phylum Echinodermata. The term is often used for the edible species of the groups, especially those that are fished or raised commercially.

**Synonyms:** - SHELLFISH, UNSPECIFIED