/ic/ - Artwork/Critique

For the love of god, I'd like some valuable input this time, as everytime I try to post a drawing that I barely manage to touch every week, no helpful criticism can be found. I want to get past this question of perspective, so I can begin to slowly advance, please. Now, does the giant crab seem properly aligned to be on top of the circular table and under the girl's elbows? I had to use a photo reference to do the crab, sadly, so it has me doubting its position.

Alright, I've taken a better picture. Please, critique the spatial reasoning on that crab as an arm-rest?