Rocky Mountain Park removes invasive fish to save endangered greenback cutthroat trout

Rocky Mountain National Park has launched an effort to eliminate non-native fish species that have disrupted its aquatic ecosystems for over eight decades. The invasive fish have significantly upset the natural balance of the park's waterways. Conservation crews are applying rotenone, a fish-killing agent, to streams linked to the Grand Ditch canal system. The targeted treatment aims to clear the way for the recovery of the greenback cutthroat trout, a species currently listed as endangered.