keep a eye on the coral beauty he may nip at it ,
you could place him in your sump next to his tub he may rehome it or intill he grows a new shell otherwise he may get beat up by hermits and fish
My LFS said regular tubeworms need their tubes buried in the sand while cocoworms don't, but otherwise they need pretty much the same requirements.
that is total myth
not one of my dusters are buried in the sand there all placed in rock work and attatched to the rocks in no time they even multiplyed which they say they never do like the small ones
between the fish and crabs and everything else in tank stiring around sand they get pleanty of sand to form bigger tubs