Caribachlamys sentis, like this orange specimen photographed at Pigeon Key in the Florida Keys, usually lives in rock crevices. The shells are often fouled by the same organisms that coat the surfaces of their environment. Scallops are among the best known bivalves. They have been widely used symbols in art and heraldry throughout history, particularly in Greek, Roman, and Medieval Europe. The family Pectinidae is known since the Triassic Period and is represented by ca. 50 living genera and ca. 400 species, inhabiting intertidal to hadal depths (ca. 7000 m) from the tropics to polar seas.