I was helping the Park Service sample Little River at Metcalf Bottoms probably 15 years ago. We shocked one and it ended up in my bucket. It was a big one, maybe 18" long if I remember correctly. Scared the heck out of me carrying that bucket to the bank. I saw one laying on the bottom of either the Clinch or Hiwassee river a long time ago. I caught one or two when I was a kid on the Kentucky River. We called them Mud Puppies in Kentucky.