<p>Now, that's not to say that I think I know what it is. It might be a family of ancient plesiosaurs that survived the dinosaur extinction, or it might be a water serpent of some kind, or it might be some other rare critter that doesn't exist anywhere else (or at least, hasn't been spotted anywhere else). I haven't the foggiest, and I don't care. I'm just sure there's something there - something - or somethings - seen and reported there on occasion, ever since the days of St Columba, a millenium and a half ago.</p>