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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, where the species was extirpated by 1936 due to habitat destruction, unregulated logging, and competition from non-native fish species. The arctic grayling ...
The Montana Arctic grayling (Thymallus arcticus montanus) is a North American freshwater fish in the salmon family Salmonidae.The Montana Arctic grayling, native to the upper Missouri River basin in Montana and Wyoming, is a disjunct population or subspecies of the more widespread Arctic grayling (Thymallus arcticus). [5]
Thymallus, commonly known as graylings, is a genus of freshwater ray-finned fish and the only genus within the subfamily Thymallinae of the family Salmonidae.Although all Thymallus species can be generically called graylings, without specific qualification the term "grayling" typically refers to the type species Thymallus thymallus, the European grayling.
Arctic grayling: Thymallus arcticus: Salmonidae Yes Bigmouth shiner: ... "Wyoming Game and Fish Department - Native Fish Species of Wyoming." Accessed April 27, 2020.
European grayling (Thymallus thymallus), the type species of the genus Thymallus; Arctic grayling (Thymallus arcticus) Australian grayling (Prototroctes maraena), a fish in the family Retropinnidae; New Zealand grayling (Prototroctes oxyrhynchus), a recently extinct fish of New Zealand
The Arctic Grayling (Thymallus arcticus montanus) was originally distributed throughout the Madison River drainage below Firehole Falls and Gibbon Falls and the Gallatin River drainage. Introductions of brown and rainbow trout into the Madison River drainage caused the extirpation of the grayling from these rivers.
The grayling grows to a maximum recorded length of 60 cm (24 in) and a maximum recorded weight of 6.7 kg (15 lb). Of typical Thymallus appearance, the grayling proper is distinguished from the similar Arctic grayling (T. arcticus arcticus) by the presence of 5–8 dorsal and 3–4 anal spines, which are absent in the other species; T. thymallus also has a smaller number of soft rays in these fins.
Thymallus arcticus — Arctic grayling; Thymallus baicalensis — Baikal black grayling; Thymallus brevipinnis — Baikal white grayling; Thymallus brevirostris — Mongolian grayling; Thymallus burejensis — Bureya grayling; Thymallus flavomaculatus — Yellow-spotted grayling; Thymallus grubii — Amur grayling; Thymallus mertensii