it is a G.Smithii it is a small smasher. and while most larger smashers should be in acrylic G.Smithii does not have the power to break glass. here is a link that has much info on the different types. of mantis.
http://www.ucmp.berkeley.edu/arthropoda/crustacea/malacostraca/eumalacostraca/royslist/index.html#directory
brandy yeah i love sun corals, even the all black ones, the down side is that you have to feed every head and if you have a large one that takes time also i moved this from mt other tank because everytime i fed it the cleaner and peppermint would steal its food. but they are beautiful