First part are Zbrush model with Keyshot render.
I also uploaded few wip pics to share my exlporation. Always enjoy the stage from sketch to rough model.
Final sculpt in Zbrush
Color Plan in Zbrush
I checked volume and pose back and forth to get proper Tpose before I went further.
I had to create support based to support floating pose, which I made coral and seaweed later.