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Grayling Habitat: Cold water and clean gravel.

Link: http://www.fws.gov/mountain-prairie/species/fish/grayling/grayling.htm

Doug

http://www.flyrodreel.com/Fly-Rod-and-Reel-Online/November-December-2007/Conservation/
More than 20 years ago, I caught one small Grayling in a tiny tributary (Nez Perce Creek?), of the Gibbon...