Image title: Lake trout fish underwater close up head
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Author Engbretson Eric, U.S. Fish and Wildlife Service
Source: https://commons.wikimedia.org/wiki/File:Lake_trout_fish_underwater_close_up_head.jpg

Lake trout (Salvelinus namaycush) is a freshwater char living mainly in lakes in northern North America. Other names for it include mackinaw, lake char (or charr), touladi, togue, and grey trout. In Lake Superior, it can also be variously known as siscowet, paperbelly and lean. The lake trout is prized both as a game fish and as a food fish. From a zoogeographical perspective, lake trout have a relatively narrow distribution. They are native only to the northern parts of North America, principally Canada, but also Alaska and, to some extent, the northeastern United States.
Order: Salmoniformes
Family: Salmonidae
Genus: Salvelinus
Species: Salvelinus namaycush (Walbaum, 1792)