Mal Maloney, scuba trainer and safety diver at Death Valley National Park, prepares to dive with fellow divers for a biannual count of the Devils Hole pupfish at Devils Hole in the Ash Meadows Nat …

Mal Maloney, scuba trainer and safety diver at Death Valley National Park, prepares to dive with fellow divers for 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