The arctic grayling, Thymallus arcticus, is beautiful sport fish that is easily recognizable due to its large sail-like dorsal fin. The arctic grayling is holarctic in distribution, which means that the species occurs in the northern parts of North America, Europe, and Asia. The arctic grayling is not native to Utah, but it has been introduced into several high elevation lakes in the Uinta Mountains.
The arctic grayling eats primarily invertebrates, including insects, insect larvae, and zooplankton. The species spawns in streams during the early spring, and eggs hatch in two to three weeks. Arctic grayling prefer clear cold water and the species does best in streams and lakes containing at least some aquatic vegetation.