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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, 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.
The scientific name of the Arctic grayling is Thymallus arcticus.It was named in 1776 by German zoologist Peter Simon Pallas from specimens collected in Russia. The name of the genus Thymallus first given to grayling (T. thymallus) described in the 1758 edition of Systema Naturae by Swedish zoologist Carl Linnaeus originates from the faint smell of the herb thyme, which emanates from the flesh.
The Mongolian grayling (Thymallus brevirostris) is a freshwater species of fish of the genus Thymallus endemic to the landlocked rivers in Mongolia, Inner Mongolia Province of China and nearby parts of Russian far east. It is considered to be the largest grayling species in the world, [2] and hence viewed as an auspicious sign by local tribes. [3]
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]
In 2017, the NPS embarked on a three-year fish restoration project in the upper Gibbon river watershed to remove all non-native trout and grayling. Grebe lake and its tributaries were poisoned with rotenone in the summer of 2017 to remove the grayling and rainbow trout. Westslope cutthroat trout and fluvial arctic grayling were planted in the ...
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Grayling, generically, any fish of the genus Thymallus in the family Salmonidae 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