"Crab in Space" -- My Next Painting

I've decided to do another whimsical (but mean) animal. I had toyed with the idea of the title, "I'm Going to Peeeeench You," but then I noticed that the blue and white-speckled enameled lid the crab was sitting on looks like one of those original sappy screensavers...like outer space. This treatment would let me disembody the crab from its background a little and focus on creating some depth through different parts of its body. Here is the edited image (based on my photograph and edited in Photoshop) ready to draw on canvas:

"Crab in Space" Edited Photograph

I had to add to the image on the right-hand side by using airbrush, clone, and brush tools so I could slide the crab over the left enough for my liking. I wanted the eyes to be left of center, and the front claw to be right of center, to create a little movement. Compared with the photograph, I also rotated the crab about 10 degrees clockwise to make the image more dynamic.

So far, I've created an 8"x10" printed reference then overlaid a grid to help me draw the background on canvas. I only have the claw done so far:

Crab Beginning
my drawing so far (just the claw)