I have a mixture of hermits that I have had for 6-9 months. Some are getting big. I have noticed lately that they are investigating my corals more and more. They get on my star polyp and my mushroom rock. I assume they are just cleaning the rocks themselves but sometimes it appears they have taken up residence in the coral.
Should there be a concern here? I have banished all of my hitchhiker crabs due to coral issues and I hoped my hermits would not pose a problem.