Yellowstone Cutthroat Trout are the most prolific native trout to Yellowstone Park and prior to the Euroamerican settlement, they were the dominant fish species. They are now an important food source for approximately 16 bird species, mammals, otters and mink. Typically, a pacific drainage species, the YCT has traveled across the Continental Divide into the Atlantic drainage. Although their primary habitat remains unaltered, nonnative fish species are a serious threat, as predators as well as hybridized breeding. The Yellowstone Cutthroat needs cold, clean water in streams and lakes and can be found in the Snake River in Nevada as well.