Only the adductor is sold commercially, but that is not the only edible part. A friend of the family who had a summer house near Witchwood on Perdido Bay, Alabama, used to eat the "tomalley" (liver) of her scallops raw as a delicacy. My dictionary informs me that this odd word, which is usually applied to the livers of lobsters, derives from a Cariban language. Apparently the Caribs used to make a sauce from lobster livers, which is not something that I would ever have guessed. Amazing things, dictionaries. Andrew K. Rindsberg "Toothless in Gaza" Geological Survey of Alabama