Thanks for the input. I did a google search on gish lice, and I think that they get my vote. What I've seen is a oval creature, attached to the fish by a point. You can move the little things on the fish, but that one point stays attached. I've cleaned fish with yellow grubs before, as well as some kind of red worm in the flesh before. I don't really worry about them. I just cut them out and cook the fish thoroughly. I'll try and get a pic, but my camera is old and doesn't catch small detail too well.
Thanks for all the info,
Swamp