Giant clam shell. This enormous specimen measures 36 in and weighs 130 lbs. Giant clams abounded in the prehistoric seas flourishing during the Pleistocene Epoch. Giant clams still live today in parts of the Pacific and Indian Oceans. Clamshell; height: 13 in x width: 36 in x depth: 22 in. Stand; height: 30 in x width: 21 in x depth: 18 in.