okay so i got some live rock from a local reefer out of his display tank. this is about 3 wks ago. i have everything set up in a 18 gallon rubber maid because of the big tank disaster. and i start hearing clicking. i thought maybe my hermits making noise so i blow it off. i get my display set back up. but two nights ago i am doing my nightly scan of the tank with a flash light because the rock this guy gave me had just tons of stuff and i look in a hole and there is somthing in there but i don't know what. it looks like a shirmp head or something realy wierd looking. but everytime i shine my light on it, it goes all the way back in its hole. i go to bed and think nothing of it. didn't see it yesterday then tonight it is poking its head out again. so i get my poker stick and put a piece of krill on it and stick it out side its hole. it grabs a piece and goes back in its hole. this thing hates the light i shine on it. so i can never get a good look at it. i did see what looked to be a greenish claw though with maybe a white tip. so after a while i put the tip of the stick in the hole and i hear click click click click. well that wasn't my hermits making the noise now. is this a mantis?? if not what else will click like that? and help would be great. i will get a pick soon if i can.