When a floater dies, this large mussel with a thick shell will actually rise to the water surface and float as it decays.
Unlike most other freshwater mussels, this species is hermaphrodic: An individual mussel can be both male and female.
About Aquatic Invertebrates in Missouri
Missouri's streams, lakes, and other aquatic habitats hold thousands of kinds of invertebrates — worms, freshwater mussels, snails, crayfish, insects, and other animals without backbones. These creatures are vital links in the aquatic food chain, and their presence and numbers tell us a lot about water quality.