This is quite the well made tattoo! It has both originality (for me since I am not really an authority over tattoo's) and it looks quite wonderful as well.
Firstly... it is simple to the eyes. Meaning that it does not have too many random lines or details that many people prefer in tattoo's - for me they are just to compensate for lack of imagination. This one is simple with details as required.
The colors and shades are also appealing. The orange and how it darkens near the base of the tail and lightens to the tail end or "cheeks"gives an impression of light and finally the swirls of blue with their grainy texture add the final touch to the work.
Again, I am no authority on tattoo's but I really like it!
well it has been quite some time since you posted anything, glad to see that you are still drawing lol altough i donīt have the know how or insight to write a critique, i can say that it looks pretty nice