Pardon my vagueness......."just that it is not natural for them...." to host clownfish.
I didn't go into much detail because hosting a clownfish was the topic
. I would continue the warning though that because of this, it may not be a "symbiosis" as people think of with a true clownfish/anemone pair and the anemone may suffer from the relationship. Just a cause for concern to watch out for, not trying to break up the couple :P .