Dead Sun - Advena Eyes and Mouth Details

Advena face details - illustrating how the eyes and mouth moves and works. With the eye, I was debating between having their iris either smaller or bigger so the circle fits into the eye, or should it be larger? I couldn't decide, so I made it in a way it can expand and shrink depending on the eye facing forward or sideways. In the case of the mouth, it turned out in an even better way during the process, I never really been considering that these creatures having teeth, so it was fun figuring out this terrifying potential~~