A Pahrump poolfish swims in a tank at the Nevada Department of Wildlife’s fish hatchery at Lake …

A Pahrump poolfish swims in a tank at the Nevada Department of Wildlife's fish hatchery at Lake ...

A Pahrump poolfish swims in a tank at the Nevada Department of Wildlife’s fish hatchery at Lake Mead on Jan. 25. The Springs Preserve will soon be home to a reserve population of the endangered fish. (Aaron Ambos/ Southern Nevada Water Authority)