Beautiful mantis! Cool it's so green (wonder if he'll change after a few molts...let us know!) Very nice tank, too. Those Eclipse are nifty, aren't they? I use the same thing, only the Hex 5...took mine to my office, too. My coworkers think it's gross (yet they all stare!)
Mine is VERY active, wonder if yours will get more so.
BTW, one mantis per tank is the general rule, especially in small set ups like a 6 gallon.
Enjoy. As I've posted before, Mantis are the coolest!