I saw the published report by the TVA in Blountville TN. Unless the Navy and the TVA are lying to the public I have no reason to doubt them just because every goober on the planet makes up a story about a monster fish, Sasquatch or aliens and the whiners cry foul.If the Boone Lake story is as well documented as the "big sucker here had a missing man inside him", then I question your idea of documentation. It's a Whale Shark (small one), not a catfish and I seriously doubt it had anything other than krill and small fish in it's stomach.
Also, the biggest animal I have ever seen in the wild was an Elephant. Up close, personal and pissed off, too.