File:Deveil's Hole pupfish (8680768743).jpg

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The Devils Hole pupfish (Cyprinodon diabolis), here photographed in its natural habitat, was listed as endangered in 1967. This iridescent blue inch-long fish's only natural habitat is in the 93 degree waters of Devils Hole, located within the Ash Meadows National Wildlife Refuge, Nye County, Nevada, which is a detached unit of Death Valley National Park. Although the cavern is over 400 feet deep, the pupfish are believed to spawn exclusively on a shallow rock shelf just under the waters surface.

Since population surveys began, Devils Hole pupfish numbers have not exceed 553 individuals. For reasons that are still unclear, the population of Devils Hole pupfish began to decline in the mid 1990’s. By the fall of 2006, an estimated 38 fish remained in the wild and two refuge populations were lost.

Past research demonstrated that their population naturally cycles in Devils Hole with the largest number of pupfish occurring in the fall and declining over the winter. Although they spawn year round in the constant 93°F water, the adults that survive the winter produce most of the next generation of pupfish in the spring.
Date
Source Deveil's Hole pupfish
Author Pacific Southwest Region USFWS from Sacramento, US

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by USFWS Pacific Southwest Region at https://flickr.com/photos/54430347@N04/8680768743 (archive). It was reviewed on 11 May 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

11 May 2018

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This image or recording is the work of a U.S. Fish and Wildlife Service employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. For more information, see the Fish and Wildlife Service copyright policy.

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United States Fish and Wildlife Service
United States Fish and Wildlife Service

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Date/TimeThumbnailDimensionsUserComment
current04:22, 11 May 2018Thumbnail for version as of 04:22, 11 May 20183,504 × 2,327 (433 KB)OceanAtoll (talk | contribs)Transferred from Flickr via #flickr2commons

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