I had just gotten a BRS gfo & carbon reactor and added alot more lighting, LFS thinks i might have just shocked my tank allowing this to pop up and try to be king. Usually about once a week i move my PHs around to hit different places and blow up poo and what not. I think i had a fish die and my shrimp feasted like crazy, i couldnt find any body or bones, i pulled out my rock when i did my PWC and he didnt pop out, but if they thrimp and snails ate him the did so within a few hours.I havent seen him aound my tank so didnt jump out, he might have gotten sucked out when i did a PWC but i didnt see it in my driveway(i usually just let my water out into my driveway, its saltwater so it wont freeze over and it kills the plants that grow outta my concrete.)