It can damage the areas of any coral it's tentacles make contact with but it will take time to completely kill a healthy coral and most healthy coral will recover from the damage. Anything near where it stops has to be moved though. In my experience anemones don't like to battle with euphilia coral though, like hammers and torches. Mine always do everything in their power to not touch them, but will sting acros, montis, acans, chalices, favias, and zoas.