I recently came across a page about clams, or freshwater mussels, from the North Dakota Game and Fish Department. It reminded me of a time, a few years ago, a cabin owner at Lake Metigoshe found a clam in the sediment near his cabin and asked me to identify it. This clam, “Sam the Clam,” was becoming a local celebrity. I could not identify it, but with the help of Dr. Andre DeLorme at Valley City State University it was tentatively identified as a giant floater (Pygandon grandis).