Apophysis tail duplicated previously and moved just enough to create a little depth and lifting appearence.
step 18 of 19
Original fish image, erased unwanted fish duplicated one fish to increase school size.
step 19 of 19
After suggestions mad by greymval and Jawshoewah, I added a blue layer over whole image because I liked how it looked over the entire picture. I also fixed area on hip refined a shadow in the stomach area. Added a very minor amount of noise over mermaid's body and tried to blend edges of starfish. Hopefully its a bit better now