[LucasK]

I don't think it's a Highfin, but it could a River Carpsucker not a Quillback. The best way to tell is the mouth, there is a picture about a third of the way down that shows all three...

http://www.tnfish.org/PhotoGalleryFish_TWRA/FishPhotoGallery_TWRA/TWRAFishPhotoGallery.htm