the bell-irving river and its tributaries support diverse fish communities. they are used for spawning by chinook salmon, coho salmon, and sockeye salmon, and by summer-run anadromous (sea-run) steelhead trout and cutthroat trout. they also provide habitat for resident (non-anadromous) rainbow trout and cutthroat trout, dolly varden trout, bull trout, and mountain whitefish.