Arctic Grayling
Thymallus arcticus
Artic Grayling are native to the northern latitudes of the United States and Canada. They were originally found in the headwaters of the Madison and Gibbon rivers, and have since been introduced throughout the state.
Arctic Grayling are a slender, silver-colored fish with coarse scales. However, the species is perhaps best known for their large dorsal fin which is reminiscent of a sailfish. During the spring spawning period, the dorsal fin of male fish becomes extremely colorful, showing off a variety of blue, green and red spots.
Native or nonnative?
Native
Wyoming classification
Game fish
Closest relative
Salmon, trout, and whitefish.
Weight
In Wyoming, Arctic Grayling usually weigh 1 to 2 pounds, however the state record weighed 2.36 pounds.
Length
Arctic Grayling do not attain huge sizes in Wyoming; 16-inches long would be considered a great fish. The current state record is 19.625 inches.
Diet
Arctic Grayling primarily forage on invertebrates (aquatic and terrestrial).
Arctic Grayling Habitat
Arctic Grayling prefer cold, clear lakes and streams. They are stocked in select waters throughout Wyoming, but stocking is subject to brood source availability. There are a handful of waters where the species became self-sustaining following an initial stocking event.
Arctic Grayling Fish Spawning
More Species
