Help! Mantis shrimp discovered!!

[FishyFishy!]

You can do one of three things in my opinion:

1) Use the bait idea again, but this time, have something ready to catch him with.

2) Remove the rock from the aquarium with him in it. This might mean breaking apart the rock to save your anemone.

3) Create a spear inside a pen tube and something sharpened with an elastic. Kind of like a spear gun, and take the little guy out. (this would be my first option... because it would be awesome to see).