Maybe this will help.
This info below was provided by Dave on another site and I downloaded it to my computer. Very interesting to look through.
The Fishes of Tennessee by Etnier and Starnes
Now FREE as a pdf (it's a big pdf, don't try to download it on a slow connection!).
http://www.newfoundpress.utk.edu/pubs/fishes/
Updates are supposedly in the works, as some of the names have changed and many new species described since 1994.