Catching A Hitchhiker Crab?

[infamous]

I have discovered a new "friend" in my tank. I was wondering what the best way to catch him would be so I can re-home him elsewhere. I am also curious as to what might happen to my other crabs/shrimp if they get caught in the same trap? (2 Hermit Crabs, 2 Pom Pom Crabs, 1 Peppermint Shrimp)

I'm not entirely sure he is a friendly guy and my Cleaner Shrimp has been missing for a couple days. I appreciate any comments and help!