Anatomical study I did as part of the CGMA course Sculpting Anatomy: from Animal to Creature with Gael Kerchenbaum which I really recommend you to take if you are into this topic.
The assignment was to pick an animal and study its anatomy. In my case I decided to study the anatomy of a giraffe which was so interesting and definitely a fun real challenge due to its skeleton peculiarities. I first sculpted the skull and the rest of the skeleton, added muscles, and eventually we made the skin and posed the model.
Sculpted in Zbrush, rendered in Maya using Arnold.