Scallop () is a common name that encompasses various species of marine bivalve mollusks (saltwater clams) in the taxonomic family pectinidae, the scallops. however, the common name "scallop" is also sometimes applied to species in other closely related families within the superfamily pectinoidea, which also includes the thorny oysters. scallops are a cosmopolitan family of bivalves which are found in all of the world's oceans, although never in fresh water. they are one of very few groups of bivalves to be primarily "free-living", with many species capable of rapidly swimming short distances and even of migrating some distance across the ocean floor. a small minority of scallop species li...

Source: Wikipedia