The Devils Hole Pupfish is often cited as the world's rarest fish.
This tiny fish is critically endangered and confined to a single location: Devils Hole, a water-filled cavern in Nevada's Death Valley National Park. Its population has historically been very small, making it extremely vulnerable to extinction. Recent counts show promising signs of recovery, with populations reaching around 187 individuals, the highest number in 15 years. The pupfish serves as a stark reminder of the fragility of ecosystems and the importance of conservation efforts in protecting rare species. Its isolated habitat and small population size make it particularly susceptible to environmental changes and human impacts.
