Urchin symbolic with bottom coral?

[Reefafarian]

I have a urchin that is always trying to find the button polyp coral colony and steals it while roaming that tank.
The polyp doesn't seem to mind it because he stays wide open the whole time on the urchin. Regardless of where we put the coral the urchin always and only goes for it. Is this normal or what should I do thanks.
(He has not hurt the polyps at all, and it's been going on for a while now )

 

[NanaReefer]

Very normal

 

[Reefafarian]

Very normal

Awesome really glad to know. Would you recommend that I always take the coral off of him or just let him stay on the urchin?

 

[NanaReefer]

Depends how much you like them. You could give him some substitutes. Couple lil Lego's will do-lol or plant matter. He's trying to hide himself from predator crabs and such.