People have been looking for Nessie for almost 100 years.
Humps have been seen moving across Loch Ness, and strange sounds heard from beneath the surface – but no actual monster.
A four-day "quest" – the latest in a long series of efforts to unravel the mystery – has been held this week.
But what would happen if the Loch Ness Monster was found – besides, of course, creating a global sensation?
The official plan
The Nessie Contingency Plan sounds like it should be in an episode of TV sci-fi drama The X Files.
But it is a set of guidelines written by Scotland's nature agency, NatureScot.
A spokesperson told us: "The Nessie Contingency Plan was produced back in 2001, at a time when there was a lot of Nessie-hunting activity on the loch.
"We were regularly being asked by the media and others what we would do if or when she, or he, was found.
"The code of practice, which was partly serious and partly for a bit of fun, was drawn up to offer protection not just to the elusive monster, but to any new species found in the loch."
