Task: Question Generation
Input (English): Passage: Fish found in Shoshone National Forest include at least six species and subspecies of trout  including rainbow, brook and brown trout. The Yellowstone cutthroat trout is widespread throughout the Greater Yellowstone Ecosystem, but in the forest is mostly limited to the Shoshone River. The mountain whitefish is also found in the Shoshone River, while the burbot is found in two streams in the southern regions of the forest.There are more than a dozen species of reptiles in the forest including the venomous prairie rattlesnake which can be found at lower elevations. The western painted and the ornate box turtle are turtle species known to exist and about eight species of lizards such as the greater short-horned lizard have been documented. Amphibians such as the Columbia spotted frog and the boreal toad are considered species of concern because of their high susceptibility to disease, habitat loss and human introduced toxins. Boreal toads are found at elevations of between 7,380 and 11,800 ft (2,250 and 3,600 m) and the Columbia spotted frog can live at elevations as high as 9,480 ft (2,890 m) in the Greater Yellowstone Ecosystem.Exotic species of fauna such as the zebra and quagga mussels and the New Zealand mud snail are invasive species that can greatly impact fish species. Though the mussel species are not known to be in Wyoming, several surrounding regions have reported them. The New Zealand mud snail has been found in the Shoshone River east of the forest. Forest managers have established a preventative program to try to keep these species from entering forest waterways.
Output (English): What is the name of the invasive species that has been found in the Shoshone river?