I just plucked this little guy out of my tank this morning. I'm not sure if it's good or bad, but I need to decide whether to put it back or not. Any help in identifying it would be greatly appreciated.
Can't help you, but it sure looks pretty! If no one can answer here, try http://www.wetwebmedia.com/ (search the FAQs for crab/hitchhiker ID, or send them the pic).