Manly peered into the water and noticed something strange. The pool was surrounded by rock and sand. It was miles from any other water body. Yet it was dancing with fish. Decades later he would remember these tiny “minnows,” each “not much more than an inch long.” — The cavern the forty-niners chanced upon is now known as Devils Hole and the “minnows” as Devils Hole pupfish, or, scientifically speaking, Cyprinodon diabolis.