+1 for what Tazzy said. Both of those are quite aggressive...once they make a tank home they won't let anything (including your hand) anywhere near their spot.
I have that same clown in my tank. I have had him for about 6 years. He doesn't mess w/ anything that stays away from his cave. As long as everything leaves his cave alone he is fine. He does have a tendency to move the sand out of his cave which ****es me off
Other then that he has been durable, and a good fish.