The photo wasn't dubunked until 1994, when co-conspirator Christian Spurling (shortly before his death at 90 years old) came clean that it was all a hoax. Something about he and his step-father getting revenge for being mocked after finding faked monster tracks on shore.
And that's why you should never hoax someone into thinking the Loch Ness Monster is real, because then they'll go a make a bigger fake that lasts 60 years and just confuses the whole world.