Mithrax ruber is one of my favorite crabs! They're more "off shore reef crab" than the Emerald. I have a collector in Florida that collected them for me on a regular bases. Unfortunately I closed my shop a few months back do to health issues, but I've "merged" with Jurassic Pet in Thornton and we're in the process of setting up tanks NOW! Our saltwater will be back up and running sometime in January. So should have plenty in stock then along with Emeralds!