New YWG should he stay or should he leave?

So I picked up a Yellow Watch Man Goby this past saturday and since then he's gone missing in my display tank. After all the stories I've heard about how others had their adventurous YWG make it down to their sump I decided to look there today. And to my surprise there he is eating away in the refugium section which is in the 2nd chamber of the sump.

I would like to keep him in there but only my concerns are that thats where I also keep two of my banished inverts (pistol shrimp and teddy bear crab).

So my question is should I move him back into my display tank and hope that he stays there for good or should I leave him in my sump and hope that he survives.

Thanks in advance for you help!


Oh and I also picked up a clownfish that my LFS said that it might be a True Percula that day too. But anyways, as soon as he went into the tank he went straight for my feather duster! I thought it was pretty neat that my duster was hosting him. Check out the pics I took!

 

Looks like a false to me. And leave him there gives you room for another in your display and something to look at in your fuge