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FMIB Back's Grayling Arctic Grayling Thymallus signifer Richardson CuvierHewlookpowak EsquimauxPoisson bleu Can Voy.jpeg Back's Grayling Arctic Grayling Thymallus signifer Richardson CuvierHewlookpowak EsquimauxPoisson bleu Can Voy Subject Arctic grayling Tag Fish Cite book Frank Forester's Fish and Fishing of the United States