Nessie

I'm sure you are all familiar with the legends of the Loch Ness monster or also known as Nessie. There have been many theories surrounding exactly what Nessie is, the most common theory is that Nessie is some kind of prehistoric marine reptile, specifically a Pleisosaur which is incredibly unlikely as the Pleisosaur lived in tropical waters and the loch is maybe twenty or thirty degrees Fahrenheit at best. Although it is possible Nessie is a marine reptile, she probably isn't a dinsaur. She is most likely a type of genetix mutation or hybrid of two species already existing in the loch. It is highly likely that there is more than one of the creatures in the lake as sightings have been retrospectively  since 565  and chronologically since 1933 and that last sighting as early as 2007 so I'll let you decide about this mysterious creature