Devils Hole Pupfish

Despite the fact that this list and our study demonstrate otherwise, the Devils Hole Pupfish is usually regarded as the world’s rarest fish (it is not quite as rare as the Red Handfish). The Devils Hole Pupfish can only be found in the Devils Hole, a geological structure in Nevada’s Death Valley National Park. The Devils Hole Pupfish is thought to have been isolated in this location between 10,000 and 20,000 years ago.

The Devils Hole Pupfish population has always been tiny in general. Their populations, according to researchers, are influenced by the amount of algae on the Devils Hole rock shelf. Scientists have counted 187 Devils Hole Pupfish in October 2018, which is the most in 15 years.