Is that a striped hermit you have in there? I caught a couple while I was visiting family in Fl.
If you mean the hermit in the last picture of post #14, then, well, I'm not sure. That shell is from a bunch of snails my daughter captured at Gulf Shores, Ala. We brought them home and it turned out one of them was a crab, but it's a much larger guy in another tank. There were some smaller, empty shells. When we put this one into our Nano Cube, it was taken to immediately by another hermit that was looking for a bigger home, and I snagged him out and put him in the contest tank. I'll try to get a better picture of the crab itself to see what he looks like. I think it's just a red-legged hermit, but I'm not sure.
Anyway, the shell reminds me of something from Super Mario Bros.