Very nice. I especially like the play on spinal structure as headgear and ornamentation. While looking at it I thought of a question: is the spinelike piece sprouting from the back of the head one of a pair, and you didn't draw the other for the other side of the head? If it is one of a pair, is the creature unable to turn its head from side to side due to them being blocked by its dorsal crest?
It's a great picture though, I fave'd it. Some real animals have restricted head movement due to their adult adornments.