A retractable foot, a siphon for sucking up water, powerful muscles, and, sometimes, a pearl ... and mussels, clams are bivalves, a kind of mollusk that's encased in a shell made of two valves ...
A: The shell or clam shell has symbolic value in many cultures ... portal of the Pisa dome where the Annunciation is accompanied with the symbol of shell and pearl, titled Rore coelesti foecundor ...
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From oysters to pearls: Know how the pearls are formed, types and difference between cultural and natural pearlsOysters are the primary producers of pearls, clams and mussels can also create ... Oysters are bivalves that means their shell is composed of two valves connected by an elastic ligament.
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