I'm glad I found your thread! I was just about to start a Shrimp ID thread. I bought one of these about a month and a half ago as a Peppermint shrimp. I knew it wasn't one, but it was the only one like this in a tank that had like 25-30 peppermints, so I asked for this one. It was cool for about 2 weeks, then disappeared. Tonight, out of the blue, there he was hanging out in a cave with my cleaner shrimp! I am so happy to have him back, hopefully he'll stick around for a while longer this time lol. I don't really know anything about them other than he eats the mysis and spirolina brine that I feed my inhabitants.