in their throat between the gill arches and behind the tongue. The dots on the Bonneville are usually larger, as well as sparser, when compared to the rainbow. And the Bonneville has a larger, more distinct jawline. Conservation As one of the features of native trout of the Mountain West, Bonneville cutthroats suffered intense fishing pressure for commerce and sustenance from the 1850s through the 1920s. At one time they were so numerous they were considered a nuisance, but today they are on the Utah Sensitive Species List. Bonneville cutthroats spawn near the mouths of streams, over gravel substrate in the springtime; having an incubation period of 24 to 25 days. Occasionally the Bonneville will interspecies-breed with rainbow trout—since the two species share many of the same waters—producing cutbow hybrids. In order to preserve the pure Bonneville cutthroat, the state of Utah has attempted to keep certain waters Bonneville-specific, such as Little Dell Reservoir, just up-stream from Mountain Dell Reservoir. See also Fishing in Wyoming Notes References The Bonneville cutthroat trout (archived copy) State of Utah Division of Wildlife Resources From the Utah Division of Wildlife Resources "Utah fish species". Wyoming Fish & Game Commission Further reading Bonneville cutthroat trout Cold water fish Freshwater fish of the United States Fish of the Western United States Fauna of the Great Basin Endemic fauna of Utah Bonneville cutthroat trout Bonneville cutthroat trout