Arctic Grayling Identification Guide
Identify Arctic grayling by their oversized, iridescent teal-and-red dorsal fin and slate-purple body.
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Key identification features
- Large, sail-like dorsal fin with iridescent teal-blue to purple coloring and rows of large pink to red-orange spots
- Slate-blue to purplish-gray body with a silvery-lavender sheen
- Scattered small black spots concentrated on the front half of the body
- Small mouth with fine teeth
- Deeply forked tail
Common look-alikes
- European grayling: similar body shape but with a smaller, less vividly colored dorsal fin and large red-orange spots that are less pronounced; ranges do not overlap, as European grayling is confined to Europe
- Whitefish and cisco species: share a similar silvery, slender body but have only a small, plain dorsal fin rather than the grayling's enlarged sail fin
- Rainbow trout: lacks the oversized dorsal fin and instead shows a pink lateral stripe with black spotting along the back and tail
Where you'll see one
Arctic grayling live in cold, clear rivers, streams, and lakes across northern North America, including Alaska and western Canada, as well as across Siberia, often found in swift, gravelly stretches of water.
Frequently asked questions
How do I recognize an Arctic grayling versus a whitefish in the same river?
The dorsal fin is the giveaway — Arctic grayling have a tall, colorful sail-like dorsal fin, while whitefish have only a small, plain one.
What separates an Arctic grayling from a European grayling?
Arctic grayling generally show a larger, more iridescent dorsal fin with bigger spots, and the two species occupy non-overlapping ranges, with Arctic grayling found outside Europe.