Fish Retopology

Hello!
The assets above are from a personal project 'Tropical fish tank'. The fish were originally created in Zbrush. With the object having thousands of polygons I attempted to retopologize by hand in blender. I really tried with these attempts, retopology is not my strongest skill but hopefully with more practice and time I will improve.
I did have some issues with baking and texturing and this is something that I am hoping to improve with the practice.
Please fell free to leave some feedback. Any feedback at all is appreciated.