Shale Diagram and shalebones
The method of how the shale would stalk the Hector was analyzed in step by step diagrams.

The Shale has as an extending jaw which snaps when it is about to feed. The internal structure of the Shale was considered when thinking about this process.

Shale 1 and Shale2
After some design details were finalized, several colorations were considered. Here are two examples. The Brown Shale was chosen.

Shaleearly and Shalecomp1
After some quick blue sky, the shale creature had a direction. Here are the first steps.