Not to cramp you design style, I like your submission a lot. If it's not to much work, the mouth needs to be a bit bigger and wider. Can you get the lower jaw lip-hook in there? Also, the ring just behind the eye is a little too well defined. Only adjust if it's easy for you.
I put you in first right now to give you a chance to update your design one more time. The lower lip should have a small point up at the tip. Remove the hook.