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Rare nevada pupfish species population reaches 25-year-high

Scientists routinely monitor the pupfish in Devils Hole. (NPS photo by Kurt Moses)
Posted at 2:50 PM, Apr 29, 2024
and last updated 2024-04-29 17:56:23-04

LAS VEGAS (KTNV) — One of the rarest fish species in the world is right here in Nevada, and scientists have great news about their growth.

During their annual spring season count, biologists with the National Park Service found 191 Devils Hole pupfish, marking the highest number observed in 25 years.

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“It’s exciting to see an increasing trend, especially in this highly variable population. Increasing numbers allow the managing agencies to consider research that may not have been possible in the past, when even slight perturbations of habitat or fish had to be completely avoided. We’re excited about the future directions with respect managing this species,” Michael Schwemm, Senior Fish Biologist for the US Fish and Wildlife Service said.

The vulnerable fish were attacked by vandals nearly eight years ago to the day on April 30, 2016. Our story on the incident and sentencing can be found here.

"Devils Hole pupfish (Cyprinodon diabolis) live in the smallest habitat of any vertebrate species on the planet. Devils Hole [nps.gov] is a deep, water-filled cavern located near Ash Meadows National Wildlife Refuge in Nye CoMunty, Nevada. The fish live in the upper 80 feet of the cave and depend on the11-foot by 16-feet sun-lit shallow shelf at the cavern’s entrance for food and spawning," said a representative with the National Park Service in an April 29 release.