PGH.. I was thinking they had a foot that would reattach. From reading there are different species of goniapora and some attach to substrate/rock and others are free living. Most forum discussions revolve around gluing it to a rock Time for you to do some investigating.. If you still can find it pick it up and see if it has any skeleton underneath(one forum conversation mentioned the skeleton underneath). You may be able to carefully glue that to a larger rock. Will keep reading and maybe someone else has had some experience with this. Also Maybe you can try to ping Scott from Unique corals and see if he has a good suggestion. If you are able to glue it then I would still put it in a cup for a day to make sure it holds and then move it where you like. Really interested to know if it does have the skeleton base.. I figured it would be a soft foot..