Loch Ness monster hunter Steve Feltham believes hoaxes are bad for his hunt for the elusive beast.
He has disputed claims a recent picture of the mythical creature is real.
He believes the photo, taken by a local tour guide, is of a fibreglass "monster" used in a documentary.
Instead of being pleased with the publicity, Mr Feltham thinks hoaxes are bad for his hunt.
On Wednesday's edition of Scotland Tonight he said: "It’s a ridiculous theory to say any publicity is good publicity. I’m trying to expose the good bits of evidence for the Loch Ness Monster. I’m here to solve this world class mystery."
Mr Feltham said the best piece of evidence so far was a sonar image taken last year of an object deep below the surface of Loch Ness.
He said: "That’s the best bit of evidence I have seen to date. On it’s own it’s not hard evidence but it’s evidence there’s something unexplained in the deep waters of Loch Ness."
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