Both my pairs of clowns one Black Clowns and the other Onxy do not host their anemones. The black ones host the output flow and the onxy host the frog spawn and both pairs dig. In the past my clown fish have always hosted their anemone even if they were hosting something different to begin with once I put an anemone in they molested it basically. I often wonder if the aquacultured clown fish which both are, are capable of recognizing the proper thing to host?