How bad is it?

[burnetb1]

They look like they are just small guys starting out and haven't had a chance to grow and connect like we are used to seeing. I would try to isolate them.By the looks of them they shouldn't sting anything , but I would worry about them outgrowing surrounding corals and covering them. I have Xenia in my tank that I keep in check by surrounding it with stinging corals.

 

[Leadfooted]

They look like they are just small guys starting out and haven't had a chance to grow and connect like we are used to seeing. I would try to isolate them.By the looks of them they shouldn't sting anything , but I would worry about them outgrowing surrounding corals and covering them. I have Xenia in my tank that I keep in check by surrounding it with stinging corals.

Thanks that’s good to hear. I just took
This pic, it’s the most accurate color I can get. I am noticing they’re growing out slightly onto the sandbed near the rock. They don’t seem to bother the Echinata but maybe I’ll just control them with peroxide? Good to hear these might not be aggressive.

 

[Poseidon03]

Do you know if they can spread to other rock if it’s not attached. Let’s say I move this rock further into the sand away from the main rock, will the polyps remain only on this one rock? If so, I’m good with that. I might just kill the main colonies with some peroxide and keep them under control.

They are a lot like xenia and zoas mixed together. They have the polyp structure of zoas, but they can grow over sand and onto other rocks like xenia. They do not sting, but they can crowd out other corals.