Purple cat’s paw pearlymussel

Mussel, once feared extinct, brought back to Ohio River

Purple cat’s paw pearlymussels. (U.S. Fish and Wildlife Service)WILLIAMSTOWN, W.Va. — “We’re in rare company,” said Tyler Hern, a biologist with the White Sulphur Springs National Fish Hatchery, as he examined a small tub containing 48 of what may be the rarest freshwater mussels in the world. “Very few people have ever seen a shell from one of these, let…