You are viewing a single comment's thread from:RE: Why It Matters When Species Go Extinct!! The freshwater pearl mussel (Margaritifera margaritifera) is an endangered species of freshwater mussel, an aquatic bivalve mollusc in the family Margaritiferidae.View the full contextView the direct parentetomesmarcel (29)in #forestfriendlyfamily • 6 years ago Thank you for the encouragement