Here's a continuation of my studies on the Sarcastic Fringehead.
I wasn't able to find a skeletal structure, but I did find some images of eggs in various stages of development. I also included some quick gesture drawings showing it's movement when swimming and fighting, as well as gender differences and a few different color patterns I've found.
Anything else I should include?
I'm also going to try to get done a full illustration of this guy hanging out in his shell home.