Got it! Had to damn near tank the whole tank apart. This two inch monster killed a maroon clown, a coral beauty angel, a cardinal, a flame angel, a fire goby, and a six line wrasse.
That's not to far from reality. I think my wife and kids thought I had gone insane because I got the feeling that no one quite believed me that I had a mantis shrimp. My lfs was skeptical for sure.