ブラウントラウト
Brown trout are largely responsible for the extirpation of cutthroat trout and Arctic grayling from their original range in the Madison and Gallatin river drainages. Brown trout are the predominant species in the Madison River drainage and very popular with anglers. Spawning runs of large brown trout into the Madison River in the Fall from Hebgen Lake outside the park attract a large number of anglers.