Natural History Wanderings

SF Gate  reported

Months after National Park Service biologists nearly lost track of the world’s rarest fish, the animal found only in a single pool in Death Valley is experiencing a rebound.

The agency counted 137 Devils Hole pupfish during a population survey on Oct. 10, after the species had recently cratered to a record-low 20 individuals last year and faced extinction. The number is also “nearly double the 77 fish observed in spring 2026 and more than double the 69 recorded in fall 2025,” the NPS said in a Tuesday news release. “The increase is an encouraging sign.”

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