Yes . . . the "shell" really isn't a shell. Think of it as embyonic in nature. It starts to harden soon after the crab shed it's hard shell. During this "molting" period the crab is motionless (stunned) and can be easily handled.
When preparing, be certain to remove the "gill like" substance that feels rough. Be sure to thoroughly wash all sand out. The "shell" can be lifted up from the sides of the body exposing the substance to be removed. Be careful not to tear the shell from the body.
After cleaning, lightly salt and pepper the crab, dredge in corn meal, and sautee in butter (for a lighter choice), or you can deep fry it (that's what I like.)
I've lived 60+ years on the Gulf Coast in Mobile, Alabama, and grew up wading in shallow water during the harvest season.
Hope this answers your question.
Mobile Guy