On Tue, 6 Dec 2005 12:20:32 -0800, "Bob" wrote:

Can anyone confirm a whitefish behavior in rivers. I've heard that whitefish
will roll small rocks over using their snounts in an effort to dislodge
nymphs. Some of have said this sometimes the flashes you'll see in a stream
when the whitefish are rolling over rocks.

The "flashing" you see is not just native to the whitefish. You will
also see Dolly Vardins and Salmon "flash" when they take a nymph. I
have only seen whitefish and char "flash". Don't know if trout do. I
doubt they are moving stones with their snouts, btw. Nymphs cling to
big rocks, not small ones.

Dave