Mississippi River Mussels

From U.S. Fish and Wildlife Service Midwest Region:

Mississippi River mussels have been at the center of attention in Dubuque, Iowa since the late 1800s due to the button making industry. Today, we are working with partners to bring back the diverse mussel populations that once thrived. http://go.usa.gov/c25bh

Photo: Fatmucket mussels by Mara Koenig/USFWS.