I have only seen one and almost stepped on it while wading in the lower little river several years ago. I thought it was a snake at first but after it moved I realized what it was.
There was another thread on this awhile back with a few picts.
http://littleriveroutfitters.com/for...ght=hellbender
this just proves....theres a website for just about everything!
http://www.hellbenders.org/The_Hellb...page/Home.html