I have a Tomato Clown in my tank, one of the first in the tank. A few weeks later I added a Marroon Clown about 1/2 of the size of the Tomato, maybe eve smaller. For about the first two weeks the Tomato was very agressvie and nipped off most of the Marroon's tail The poor little gut was expected to be a goner.
He managed to find a good hiding place a nd healed up quite well - his tail is now completly back and he has taken up resicence in a Zenia coral within inches of where the Tomato lives with his Bubble Anemone. The Marroon is also starting to like a Long Tenicle Anemone in the same area.
End of story - The Tomato has not bothered the marroon for at least six weeks. Maybe they are too busy worrying aabout the Yellow Tail Damsels.