Biologists try to dig endangered pupfish out of its hole

A biologist is giving important guidance in the efforts to rescue a critically endangered fish found only in Devils Hole, about 60 miles east of Death Valley National Park. It is estimated that fewer than 100 Devils Hole pupfish remain. Considered the world's rarest fish, the wild pupfish faces a 28 to 32 percent risk of extinction over the next 20 years.

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