About the Arctic Grayling
Arctic grayling (Thymallus arcticus) is a species of freshwater fish in the salmon family (family Salmonidae) of order Salmoniformes. It comprises five subspecies native to the Nearctic and Palearctic ecozones. T. arcticus is widespread throughout the Arctic and Pacific drainages in Canada, Alaska, and Siberia, as well as the upper Missouri River drainage in Montana. In the U.S. state of Arizona, an introduced population is found in the Lee Valley and other lakes in the White Mountains. They were also stocked at Toppings Lake by the Grand Tetons.
Arctic grayling are widespread in Arctic ocean drainages from Hudson Bay, Canada to Alaska and in Arctic and Pacific drainages to central Alberta and British Columbia in Canada. They do not occur naturally in the Fraser and Columbia river basins. There are remnant native populations of fluvial arctic grayling in the upper Missouri river drainage in the Big Hole river and Red Rock basin. Fluvial arctic grayling have been reestablished in the upper Ruby river, a tributary of the Beaverhead river. The native range formerly extended south into the Great Lakes basin in Michigan. They occur naturally in the Arctic ocean basin in Siberia from the Ob to Yenisei drainages and in Europe in some tributaries of Pechora river. Lake dwelling forms of Arctic grayling have been introduced in suitable lake habitats throughout the Rocky Mountains, Cascade Mountains and Sierra Nevada Mountains as far south as Arizona.
Read more about the Arctic grayling at Wikipedia.