Hope you don't mind a few constructive criticisms? Having spent the last three years studying this plesiosaur intently (there is no smiley wearing specs, nevermind), I would make a few suggestion for improvement, but as far as first plesiosaur illustrations go, its pretty good
In particular, the eye is too far back and the skull is too shallow, the tail is a bit too long. I would also suggest using a sharper, lighter pencil for outlines.
I checked out your gallery a few times by the way.
"Boy, do I hate being right all the time!" - Ian Malcolm