I'm glad you liked them! I'm sometimes hesitant because some people get offended. But the thing is, when I see a concept that I really like, the wheels of my brain start churning out ideas and I feel compelled to share them. Really, these will make a great race of creatures!
...oh, and one other thing I thought of for when you design their costumes: real crabs often camouflage themselves with plants on purpose (or just let it grow on their shells) so you could design them with very mysterious, camouflaged armor and clothing.