I was working on a tank today doing a H2O change and a light algae scrape and saw an arm that was at least 2" long reach out between a couple of live rocks. I thought it was a huge Gorilla Crab as the claw size was near an inch in size, however upon further review, I realized it was a Mithrax I put in there over a year ago. It's color had turned to a dark red/black, and looks like Phong and I could be eating it pretty soon due to it's size. Just 'cause you don't see it doesn't mean it's not there