I will step in here and say that I have used a fake anemone for my maroon clown. Before I had found a good anemone (or was ready to keep one) my little "Marlin" loved his fake one. Yes, I was teased about it from time to time, but - hey- it was the best option at that particular moment.

Here is a pic of Marlin in his rubber home back in the summer of 2005: