In an attempt to rescue a rare darter in the lower Susquehanna River, a Penn State research team, working with the Pennsylvania Fish and Boat Commission, has determined that the fish is a distinct subspecies found nowhere else. And that makes the effort to restore its population even more important, the researchers say.
Click here for original story, Researchers discover one-of-a-kind fish is local to lower Susquehanna
Source: Phys.org