Can a zoanthid come loose from a colony and reattach somewhere else in the tank? I have a colony that is located on the shell of a bivalve that had some loose heads when I bought it. I'm sure as the bivalve moved around at first a piece or two came off. I discovered a head at the bottom of my tank growing, and I'm thinking it may be one of the pieces that came loose. Just was not sure that's possible. See pictures below.