Until the early 1990s, Dolly Varden and Bull Trout were considered the same fish. Visually they are very hard to tell apart. The big difference between the two is Dolly Varden are anadromous. In otherwards they go to the ocean, but return to freshwater to spawn. They are pretty much coastal fish, and don't appear in streams to far from the ocean, Their distribution does not extend far inland, although they are found in the headwaters of the Fraser, Liard, and Peace river systems. They extend farthest inland in the Skeena and Fraser river systems. They are not found in the Columbia river system.
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