What is a Bivalve?

What is a Bivalve?

• A. Mollusk
• B. Bivalve
• C. Cephalopods
• D. Gastropod

Answer: (B)

A bivalve is a type of mollusk that has two shells hinged together. That two-shell design is the defining feature, with the shells (valves) protecting the soft body and typically connected by a hinge. Bivalves are aquatic filter feeders, drawing water in and out and using gills to capture food particles. They lack a distinct head, which helps differentiate them from other mollusks. Examples include clams, oysters, mussels, and scallops. In contrast, cephalopods such as octopuses and squids have a prominent head and arms and no paired-shell structure, while gastropods like snails usually have a single shell or none. The two-shell arrangement is what identifies this group as bivalves.