Contact: Mike Wolterbeek
University of Nevada, Reno
Caption: Scuba divers conduct fish research at Devils Hole, an isolated geothermal water-filled limestone cavern in the Nevada desert. The aquifer-fed pool in the Ash Meadows National Wildlife Refuge, a detached unit of Death Valley National Park, is the habitat for the only naturally occurring population of the endangered fish. It is an extreme environment, with water temperatures and dissolved oxygen concentrations near their lethal limits for fish.
Credit: Photo by Scott Tyler, University of Nevada, Reno.
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Related news release: Climate change puts endangered Devils Hole pupfish at risk of extinction