This piece is nigh on flawless. The pure appearance, without any sign of brushes is amazing, and I have not seen better in my life. I have not seen a creature like this before, and it is an impressive design, I really like the way you did the tentacles, they look generally bad ass. The technique is so astounding, I can't even see it. Like I said I can't spot a single brush mark, or colour flaw. Not a single pixel is out of place. And the impact is astounding, the scene, the motion blur, the lighting, the expressions, they all bring on an overwhelming sense of adrenaline packed combat.
I have not scene a better piece of art to date, I give this image perfect.