Olin Feuerbacher, a fish biologist with Fish and Wildlife Service, records dive data during a biannual count of the Devils Hole pupfish at Devils Hole in the Ash Meadows National Wildlife Refuge o …

Olin Feuerbacher, a fish biologist with Fish and Wildlife Service, records dive data during a biannual count of the Devils Hole pupfish at Devils Hole in the Ash Meadows National Wildlife Refuge on Saturday, April 7, 2018. Patrick Connolly Las Vegas Review-Journal @PConnPie