In Grand Teton National Park there is a place where invasive Guppies, Swordtails, and Cichlids Thrive. It is Called Kelly Warm Springs. As a child I had several adventures trying to catch fish in it. Today, it is recommended you don't go wading in it due to it having populations of Brain-eating amoeba, Naegleria fowleri. Invasive Fish Populations still seem robust, and the solution to the Kelly Warm Springs Dilemma has not yet been figured out. Music Vespers by Topher Mohr and Alex Elena