a blueish gray color
cheese
It is spelled Plesiosaurus.
yes
It's very possible.
Nessie was a plesiosaurus. I should know I have a dinosaur encyclopedia.
Due to the Lock Ness Monster's plesiosaurus-like form (long neck, small head with sharp teeth), it is assumed to follow a plesiosaurus-like diet. So it eats fish. A lot of fish.
Icthyosaurs and plesiosaurs are referred to as marine reptiles. They were not closely related.
Tylosaurus Styxosaurus Elasmosaurus Platecarpus Mosasaurus Kronosaurus Liopleurodon Plesiosaurus
Some believe that Nessie is a Plesiosaurus, or a descendant of one.
Plesiosaurus most likely was solitary. With the exception of marine mammals, there aren't any truly social aquatic creatures. Some fish swim in schools, but there is no social structure. Marine reptiles aren't even known to swim in groups, much less to have social interaction.
Not long enough to perpetuate a legend about it dwelling in a certain loch, in a certain northern European country.
No, it is not. It is probably some species of plesiosaurus that didn't extinct because it has found a habitat (Loch Ness) which it likes.