These two fish are the same species, but Rainbow trout live entirely in freshwater while Steelhead trout are ocean-living and only spawn in freshwater. Large color variation, but spawning adults have red to pink 'rainbow' color on sides. Native and introduced stock of rainbow trout are present in park lakes and streams. Steelhead, listed as 'threatened' under the federal Endangered Species Act, may also be present in the park. Hybrids of rainbow and cutthroat trout are also present in many park streams. A native char, olive-green to silver with pink and yellow spots on sides. White leading edges on pectoral, pelvic and anal fins with a distinct clear translucent dorsal fin. Originally considered same as Dolly Varden trout, but now are identified as separate species. Bull trout within the park have been shown to have multiple life history strategies including headwater residents, mainstem river migrants, and ocean going anadromy (migrate from the ocean). Bull trout is listed as 'threatened' under the federal Endangered Species Act.