grayling

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grayling,

common name for a brilliantly colored fish belonging to the genus Thymallus, of the family Salmonidae (salmonsalmon
, member of the Salmonidae, a family of marine fish that spawn in freshwater, including the salmons, the trouts, and the chars (subfamily Salmoninae), the whitefish and the ciscoes (subfamily Coregoninae), and the grayling (subfamily Thymallinae).
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 family), and closely allied to the smelt. Graylings are found chiefly in clear, cold, fresh waters of the Northern Hemisphere. They average 1 ft (30 cm) in length and 1 lb (.45 kg) in weight and exhibit hues of silver, gold, violet, blue, and olive brown. The arctic grayling, which can reach more than 8 lb (3.6 kg), was found in Michigan and Montana as well as Canada, Alaska, and Siberia, but the Michigan population is now extinct. The genus name, Thymallus, refers to the odor of wild thyme characteristic of the delicious flesh of fresh specimens. Graylings are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
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, subphylum Vertebrata, class Actinopterygii, order Salmoniformes, family Salmonidae, subfamily Thymallinae.