gobies -- 002

gobies -- 002

clubshell mussels

 Clubshell mussels, shown here, are one of four mussel species in French Creek that are listed under the Endangered Species Act. They are considered critically imperiled and have lost 95 percent of their historic global range — but they appear to have a stable population in the north west Pennsylvania stream.

IMAGE: Ryan Hagerty / U.S. Fish and Wildlife Service