“All types of high-tech underwater contraptions have gone in after the Loch Ness Monster, but no one can find her … Some people in Inverness aren’t keen on collaring the monster, and you can’t blame them: An old prophecy predicts a violent end for Inverness if the monster is ever captured.”
-DANFORTH PRINCE, Frommer’s Great Britain
There are many skeptics in this world and a good many of them have their own opinion about the Loch Ness Monster. A more recent theory suggests that seismic activity in a fault line that runs under Loch Ness releases large amounts of gas bubbles which, Piccardi suggests, could be painted as sightings of Nessie. Although Piccardi has only analyzed 40 of the more than 3,000 known sightings, it is a theory that might take off in the near future.
The Great Glenn Fault that runs under Loch Ness.
Another theory suggests that the damaged environment of the Loch may have killed off Nessie.
“I couldn’t tell you if Nessie is still alive,” Robert Rines said. “There is almost no vegetation in some parts of the lake.”
Since the 1970’s, sightings of the Loch Ness Monster have gotten fewer and fewer in number.
In Search of Nessie 
Both of these theories are interesting and theories I have never heard before. I would be interested to hear more about them but as of now I do not really believe that either of them are true. I believe the Loch Ness monster is just a made up urban legend. But you never know. It is cool how you included the poll in your post!
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I have never heard of the Great Glenn Fault, but it’s an interesting idea. I just wonder how bubbles could be mistaken for a huge “monster”. Maybe if the study expands and more it might become more believable! And as for the second theory… you can’t survive if you can’t eat. I don’t know if that means there has to be vegetation somewhere for Nessie to eat, or there’s no Nessie to eat any vegetation.