Yellowstone Lake and the upper Yellowstone River once contained the largest population of Yellowstone cutthroat trout in the world. In the 1980's lake trout were introduced to Yellowstone Lake and the cutthroat population has crashed by at least 90%. This video illustrates why Yellowstone cutthroat trout are so important to Yellowstone and what is being done to try to save them.
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Saving Yellowstone Cutthroat Trout
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