Steve Feltham gave up his home, his job and his girlfriend to solve the mystery of the legendary Loch Ness monster.
But now, after 24 years of looking, he believes Nessie is nothing more than just a big catfish.
He's a phenomenon on his own and is in the Guinness Book of World Records.
In the 1990's, he left his partner and daughter in Dorset to take up residence on Loch Ness shores in search of the mystical creature.
The monster, affectionately known to many as 'Nessie', lives more than 100 years and is said to eat other fish.
Mr Feltham now believes that fits the description of a Wels Catfish – a fish introduced into English lakes in Victorian times but not into Loch Ness as far as anyone knows.
It may not be Nessie, but Mr Feltham believes there's still a mystery to uncover.
"You can't say Loch Ness has nothing to be explained, Loch Ness still has something massive to be explained – whatever it turns out to be," he says.
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