Bittersweet Shells of the Glycimeridae Family are solid, roundish, clam shells with a curving row or chevron of teeth at the hinge. There is a gap at both ends of the closed shell. The word “Glycimeridae” comes from the Greek term meaning “sweet part” and the Bittersweet Clams are highly regarded in culinary circles. Bittersweets are usually found within sand or mud bottoms. The Bittersweets have a global distribution and are found in warm water environments from shallow to very deep waters. There are forty-five known species in the Glycimeridae Family.