I am grateful you did not ruin it with the watermark (some just don't know how to use it properly.)
This is a very fine piece. I like how you draw the faces.
I know it'd be a lot of work, but have you considered adding a scale pattern for the tail? (being red, I simply assume it is not inspired from a mammal -dolphin etc- hence my question).
I am not sure what you used as reference, but the shading is marvelous.
also, another question just popped into my mind.
Could someone buy a copy of the original, other than the original buyer? Not that I want to buy right now, but for future reference.