Advise for removing crab hitchhiker

[anthony2012]

Hello! I run a 20 gallon tank with a few easy keeper corals. I’ve had the tank for close to a year now and last night I noticed a crab hiding between the rock work in my aquarium. Based on what I’ve read it’s rare for these guys to be beneficial and was wondering if anyone had advice for finding and catching these guys. I didn’t want to rip up my whole aquarium chasing it down. I don’t think I could bait him because my other inverts (serpent star and hermit crabs) would probably get the bait first. I couldn’t get a super good look at it but it was brown with hairy legs so I am assuming it’s a gorilla crab based on the pictures I saw online. any advice would be greatly appreciated, thanks!

 

[Futuretotm]

Option A - chopstick/crab sheesh kebab

Option B - shot glass, angled with a piece of shrimp - crab goes in, can't climb out, place close to his castle

Option C - puffer (?)

 

[Eagle_Steve]

Option D - small bottle with the top cut off, top then inverted into bottle with it lightly glued into place with superglue and a piece of shrimp.

 

[saltybees]

 

[anthony2012]

Option A - chopstick/crab sheesh kebab

Option B - shot glass, angled with a piece of shrimp - crab goes in, can't climb out, place close to his castle

Option C - puffer (?)

Thanks I’ll give it a try, it might up just being a crab kebab

 

[NeonRabbit221B]

Take the rock out and put it in SW at 1.040 salinity. He should run out.