noun
: a large stout-bodied and sometimes anadromous trout ( Salmo gairnerii ) of still and flowing waters of the Pacific coast of No. America from southern California to Alaska that has a large head and small mouth, that in the typical freshwater form is greenish above and white on the belly with a pink, red, or lavender stripe more or less developed along each side of the body and usually profusely sprinkled with black dots, and that is highly esteemed as a sport and food fish although in parts of Alaska considered a pest because of its destruction of salmon eggs — see steelhead
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