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Definition of Term

grilse
(english) Immature anadromous salmonids just before or just after enterinig the river to spawn while still in silvery sea-run condition. Used particularly in reference to Salmo salar and members of the genus Oncorhynchus. Strictly a mature one-winter salmon ready to spawn and so much smaller than those having spent several winters in the sea. (See also: anadromous, spawn, Salmonids)

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