Shellback crab

It seems, H. arcuata has not been reported in Central america, but we do have H. panamensis, unfortunately, I can´t found any pictures of the species, so I will only use the genus name until a confirmation

Me too--never saw such a thing. It's an absolutely fabulous spotting.

Wao Auntnance, thanks for your help, I was really intrigued by this crab

Very interesting!