The shell of an oyster or clam is commonly referred to as a "valve." Bivalve mollusks, which include oysters and clams, have two hinged shells (or valves) that protect their soft bodies. These shells are composed primarily of calcium carbonate and serve to provide structural support and protection from predators.
A clam. Or an oyster.
mother of pearl
clam ,oyster ,scallop
A clam... so does an oyster.
This is a bivalve mollusk.
A shellfish with five letters is a prawn
an oyster
the oyster
oyster :) <3
A clam shell
Sea otters & birds such as oyster-catchers
scallop