While cleaning Rainbows this year i found in 2 of them "white worms" in the gut cavity of one fish and thought nothing of it, till i caught another and had the same thing. One was caught with ice still on rivers other was caught not to long ago. Just wondering if any of you guys have seen them in your fish. i did some digging and it seems they are all to common in Rainbows and many other fish. A couple of things i dug up.
http://collier.ifas.ufl.edu/SeaGrant/pubs/Fact%20Sheet%20on%20worms%20in%20fish.docx[1].pdf
http://media.spokesman.com/documents/2012/11/out_parasites.pdf