Identification Crab/Shrimp

[alton]

I have had my 200 forever, but just recently added some live rock from another aquarium. Yesterday when I got home I went to feed and noticed a creature that looked similer to a Coral Banded shrimp, but with crab legs and it was orange and white. It was approximately 2". I have two cleaner shrimps in this same tank and one of them was about three inches away and not concerned. Sorry about no pictures but he dissapeared when I came back. This was definitely not a molt from the cleaner shrimp. Was it the Lochness shrimp or crab creature?

[alton]

Did not look like a porcelan crab. It might have had a tucked under tail I couldn't really tell. Just looked like a shrimp with crab legs. I was just shocked how I could miss something this large in my tank, I guess you learn something new every day no matter how long you have been in the trade? Should I be looking under lobsters for my search?

[hobogato]

pistol shrimp? mantis?

[alton]

Oh well it has disappeared again, haven't seen it since. Probably another 5 years till I see it again? Thanks for the info.