Tuxedo urchin

[Tofer]

I have had the urchin for about 6 months and everything has been fine doing what I got him for .
last week I noticed a small piece of arco I broke off when cleaning tank and I had glued to frag plug was gone to the glue . Then this morning I noticed 2 small branches of a different acro on the where gone Skelton and all to the base .
is this my culprit?

 

[Cory]

Urchins are always picking up and moving stuff. Probably one way corals relocate in nature.

 

[Mical]

Meet "Roomba"

 

[Tofer]

I know they pick up and decorate themselves but this is definite damage to the coral as far as eating .