Why Are Pupfish Endangered?

Many pupfish species have incredibly low numbers and are federally listed as endangered. It's natural for pupfish to occur in low numbers because their habitats can't accommodate large populations. ... Pollution and invasive species affect some species.

How did the Devils Hole pupfish become endangered?

This short-lived species (approximately one year) has a natural high and low cycle, with the population in the fall decreasing from 35-65 percent in the spring due to natural die-off. When population counts began in 1972 pupfish numbered around 550 individuals.

Why is the Devils Hole pupfish so rare?

In short, there are several types of Desert Pupfish, but the Devils Hole Desert Pupfish is the rarest of them all. The reason? They were the first group of fish to be isolated in their own environment, confined to Devils Hole for 10,000 to 12,000 years.