mantis shrimp

[the marine apprentice]

i helped out a fellow canreefer tonight by trading my extra 90g tank for hers that had a leak 3 inchs from the top. so she brought it over along with a few extra large coffe from timmies, and it still had a bit of water and some rubble and such in the bottom. while my girlfriend and i were cleaning it out we found a little crab in the water and also a shrimp about half an inch long. so i put both of them in a glass cup with some tank water from my tank and they both can right to life bouncin around the glass. so i set the cup down on my pool table and continued cleaning the tank. every few minutes i would hear this loud ding liek someone hitting a cup with the point of a knife. i thought it was just my gfs bearded dragon hittin stuff. then i went to check on the crab and the lil shrimp and i wated the shrimp smash its claw on the cup and it made that noise. i have never seen a mantis before but this is friggin cool.

main question is... what do i do with it??