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The Arctic grayling (Thymallus arcticus) is a species of freshwater fish in the salmon family Salmonidae. T. arcticus is widespread throughout the Arctic and Pacific drainages in Canada, Alaska, and Siberia, as well as the upper Missouri River drainage in Montana.
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.
When the removal is complete, the NPS will stock native westslope cutthroat trout and fluvial Arctic grayling in the upper Gibbon watershed to create a refuge for these species in the park. Although labeled a restoration project, neither species were indigenous to the upper Gibbon watershed. [13]
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.
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
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The bore species group: Oeneis alberta (Elwes, 1893) – Alberta Arctic; Oeneis ammon (Elwes, 1899) Oeneis bore (Schneider, 1792) – Arctic grayling or white-veined Arctic; Oeneis chryxus (Doubleday, 1849) – brown Arctic or chryxus Arctic; Oeneis ivallda (Mead, 1878) – California Arctic; Oeneis nevadensis (C. & R. Felder, 1866) – great ...