Browny the crab

I tried finding the exact specie of this tiny crab, but was unsuccessful. I don't think this one is a ghost crab like the other one I found at the same beach at Pipa, Rio Grande do Norte, Brazil. Maybe it is a specie of a stone crab.

These small crabs, from what I observed, preferred living in small crevices that the sea water sculptured in the rocks and boulders at the beach.

The other crab from the same beach: [link]

Featured: [link]