Devil’s Hole Pupfish
Usually Found: Devil’s Hole in Nevada, USA
The Devil’s Hole Pupfish is only found in Devil’s Hole, a water-filled cave in the state of Nevada. The species is incredibly beautiful for cave-dwelling creatures, yet they are still creepy animals as well. The look is pretty after a bit but if you ran across this fish randomly it would catch you off guard. Sadly, the species is critically endangered yet still consumes every available food resource in Devil’s Hole, even diving beetles. While mating takes place, the females produce very few eggs.
Plus, survival from egg to adult is sadly low. In fact, most of these pupfish live between 10 to 14 months only. It is clearly a small fish and they vary in color based on their sex. Males are bright metallic blue while females or juveniles are yellowish. The most defining trait of the species is its pelvic fins, and you can see why.