Arctic Grayling

WY Arctic Grayling Fishing Guide

WYFreshwater
FishingThymallus arcticusWyoming2026

Description: Arctic Grayling are slender, silver-colored fish with coarse scales. They are best known for their large dorsal fin which is reminiscent of a sailfish. During spring spawning, the dorsal fin of males becomes extremely colorful, showing off a variety of blue, green and red spots.

Diet: Arctic Grayling primarily forage on invertebrates (aquatic and terrestrial).

Habitat: They prefer cold, clear lakes and streams. The species is stocked in select waters throughout Wyoming. In a few waters, the species became self-sustaining after initial stocking.

Size: Typically 1–2 pounds in Wyoming. The state record weighed 2.36 pounds. They do not attain huge sizes in Wyoming; 16-inches long would be considered a great fish.

Lifespan: No specific lifespan data available for this species.

Habitat & Range

Arctic Grayling prefer cold, clear lakes and streams. They are stocked in select waters throughout Wyoming, but stocking is subject to brood source availability. In a few waters, the species became self-sustaining after initial stocking.

Life History

Arctic 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 Wyoming. Spawning occurs in spring when male dorsal fins become colorful.

License & Regulations

A valid Wyoming fishing license is required for anglers age 14 and older. Licenses are available for residents, non-residents, and short-term durations (1-day and annual). Purchase online through the Wyoming Game and Fish Department website or at authorized license retailers throughout the state.

Frequently Asked Questions

Description

Arctic Grayling are slender, silver-colored fish with coarse scales. They are best known for their large dorsal fin which is reminiscent of a sailfish. During spring spawning, the dorsal fin of males becomes extremely colorful, showing off a variety of blue, green and red spots.

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.

Diet

Arctic Grayling primarily forage on invertebrates (aquatic and terrestrial).

Size

Typically 1–2 pounds in Wyoming. The state record weighed 2.36 pounds. 16-inches long would be considered a great fish; the current state record is 19.625 inches.

State Record

2.36 pounds, 19.625 inches

Regulations

Arctic Grayling is classified as a game fish in Wyoming. A valid Wyoming fishing license is required. Check Wyoming Game and Fish Department regulations for current rules on bag limits and seasons.

References

State Category Directory Subcategory Content Source
Wyoming Fishing License License & Fees A valid Wyoming fishing license is required for anglers age 14 and older. Licenses are available for residents, non-resi Link