Aquatic speices only.
This species actually does't have a common name. This one is found in a single pool about 40 feet long on a private ranch in the Texas Hill Country and nowhere else in the world. The pool averages about 5 inches deep. The pool lies at the bottom of a hill. The pool's water supply is constantly fed by a cave about 20 feet above it. The water runs out of the cave, down the side of the hill and into the pool.