This site (see link below) has a video from youtube on it that claims to be a film of the carcass of the Loch Ness Monster on the bottom of the Loch .
It is from a TV programme I believe , but don't know if it has been screened yet. go take a look and see what you think. Just looks like a heap of mud to my untrained eye.
Upcoming Loch Ness Monster Documentary
5 days ago