Love the colors! :D I also think I would enjoy creating something similar to this. Fun! Here are some tips that I think you will find helpful! :D
1) If it is an angry mermaid, I think she should express it, at least a little in her face. Right now it's kind of like... barbie face. You know what I mean?
2) I love the hair!!! But, if the hair wasn't covering her left shoulder.. It would look a little strange I think. It appears that it comes further up than where her collar bone is located.
3) The ear is just a little toO high in my oppinion. The upper lobe of the ear generally connects onto the side of the head horizontally aligned with the eye... and the bottom lobe aligns with the bottom of the nose.
Otherwise, I'm impressed my the details.. I always appreciate those. Once some of the anatomy is fixed, This would be quite stellar! Very nice! :D
