The upper Columbia River and Missouri river basin are the ideal water bodies to find the Westslope Cutthroat Trout (Oncorhynchus clarkii lewisi). It is also called the common cutthroat trout, black-spotted trout, or red-throated trout. This freshwater fish is quite unique because it has teeth on the roof of its mouth, under its tongue, and in front of the mouth. The orange-hued skin is clustered with dark, freckle-like spots. Beneath the jaw is orange, red, or pink markings used to distinguish it from the Rainbow trout. It is also distinguished from other cutthroat species by the small spots visible on the tail, but none on the pectoral fin.