Cutthroat Trout / Subspecies / Northern Rocky Mountains

The Snake River fine-spotted cutthroat trout is a form of the cutthroat trout (Oncorhynchus clarkii) which is considered either as a separate subspecies Oncorhynchus clarkii behnkei, or as a variety of the Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri). The fish takes its common name from its original habitat, the Snake River of southern Idaho and western Wyoming, and from its unusual pattern of hundreds of small spots that cover most of its body, differing from the larger-spotted Yellowstone cutthroat pattern. Genetically it cannot be distinguished from the Yellowstone cutthroat trout, and before the construction of dams there were no physical barriers between the ranges of the two subspecies in the Snake river drainage.

image credit: National Park Guide.

For more information: Fly Fisherman Magazine      

The Westslope Cutthroat trout (Oncorhynchus clarkii lewisi), also known as the black-spotted trout, common cutthroat trout and red-throated trout is a subspecies of the cutthroat trout (Oncorhynchus clarkii) and is a freshwater fish in the salmon family (family Salmonidae) of order Salmoniformes

Image credit: Kevin van Bueren of North Cascades Fly Fishing

For more information, Western Native Trout Initiative    Montana Field Guide   National Park Service/Yellowstone   Native Trout Fly Fishing

The yellowfin cutthroat trout (Oncorhynchus clarkii macdonaldi) is an extinct subspecies or variety of the cutthroat trout, a North American freshwater fish. Until about 1903, greenback and yellowfin cutthroats survived together in Twin Lakes, the populations remaining isolated as both breeders and feeders. The end for the yellowfin cutthroat came soon after the introduction of the rainbow trout to Twin Lakes. The greenback population interbred with the rainbows, resulting in cutbows, but the yellowfin disappeared completely. The yellowfin is now extinct.

The Yellowstone cutthroat trout (Oncorhynchus clarkii bouvieri) is a subspecies of the cutthroat trout (Oncorhynchus clarkii). It is a freshwater fish in the salmon family (family Salmonidae). Native only to a few U.S. states, their original range was upstream of Shoshone Falls on the Snake River and tributaries in Wyoming, also across the Continental Divide in Yellowstone Lake and in the Yellowstone River as well as its tributaries downstream to the Tongue River in Montana. The species is also found in Idaho, Utah and Nevada

Image credit: henrysfork.org

For more information: Western Native Trout Initiative   Yellowstone National Park   

snake river fine spotted cutthroat-trout
westslope cutthroat trout

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Yellowstone Cutthroat Trout