I absolutely love Pom Pom crabs. They're like a small cheerleader/mascot of a tank. One question about these is do Pom Poms damage Coral to replace dead Anemone? I know they split it but what if the anemone is too small to split. I also wonder if they get aggressive and eat small 1" fish.
Nope. They only use the anemone. They take care of them by feeding them. I had one for 4 years and never had problems with it touching corals or losing an anemone. My current one I've had a year in a 10 gallon Nuvo with tons or florida ricordea, zoanthids, coral banded shrimp and pistol shrimp with no issues. They will not harm fish. They are very small.