Clownfish

When clownfish lacks anemone, it can occupy soft coral or large polyp stony coral.

An excerpt from the article 15 facts about Clownfish
Sometimes they even prefer those corals over anemones. This happened in our editorial reef tank when Amphiprion moved to Pleogyra coral, leaving Entacmaea quadricolor anemone alone. It stays away for over a year, and I'm sure it won't go back anytime soon.