Most of the descriptions of the loch ness monster speak of a monster as a large reptile with a long neck and flippers. So many scientists say the loch ness monster(s) could be a plesiosaur which is an extinct dinosaur. They think this because the descriptions of the loch ness monster and the plesiosaur are the same. But plesiosaurs would need a huge breeding colony and we would know about it unless it was somewhere in a place we don't know about.
But many biologists argue that the loch ness monster being a plesiosaur would be impossible as there is not enough food in the food chain to support it. And the plesiosaur couldn't have survived the ice age as loch ness was formed after the ice age.
But some sightings have not been the same description as the plesiosaur as some people have seen it on land. These people say it looked like a camel or horse.
Biologists also think that all the sightings of the loch ness monster have been mistaken for a normal object or by something people are not used to seeing. Another reason for the loch ness monster is it being bubbles made by minor volcanic eruptions.
So the scientific reason for the loch ness monster is that there is no loch ness monster in loch ness.
