Of course not. Nessie is not, nor has she ever been, a friggin were-horse. Or a shapeshifting donkey. Not a unicorn either, so don't even ask.
Nessie is the greatest lake monster of them all. She doesn't actually exist, but that does absolutely nothing to diminish her greatness. With the exception of Bigfoot or his cousin Abominable, no legend even comes close to Nessie. Campfire stories and urban wannabe-legends can come and go, but only Nessie is still fun after 100 years.
Nobody remembers the moth man anymore. Bloody Mary (the chick, not the drink) is a little girls' slumber party game. Pazuzu was cool for a while, until they did the sequel and we found out that this big bad demon was a god dammed cricket. And the slender guy is a dweeb, in fact he doesn't even qualify for this list.
But a centuries old living dinosaur-critter, who poses for out of focus photos yet leaves no footprints and obviously doesn't eat anything, living in a serene lake in the Scottish highlands? That's got some zing to it.