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Devils Hole pupfish
The Devils Hole pupfish is a species of fish that is found in Devils Hole, a small, isolated pool of water in the Mojave Desert of Nevada. It lives in the top 24 meters (80 feet) of this pool which is 130 meters (430 feet) deep. It is a small fish that is less than 5 centimeters (2 inches) in length, and it is one of the rarest and most endangered fish species in the world. The Devils Hole pupfish is perfectly adapted to live in the warm, alkaline waters of Devils Hole, and it has a unique mating and reproductive strategy.