RFAs do generally stay in one place once they settle in. They may move around some at first. And the have a tendency to like living at the sand/rock interface, attached to the edge of the rock at or just below the sand. But if they find a suitable hole in a rock, they may settle in there and stay forever. I've always been a fan of placing them in PVC plumbing end caps. Put them in an end cap and push the end cap down into the sand and they almost never move.I'm currently setting up my 120gal display, and this post makes me want to get a bunch of rock flowers for that tank!
Do they generally stay in place, and are they aggressive?
Thanks for this awesome post!
I've had no issues with RFAs being aggressive. I have Maxi-mini nems and zoas right up close. I'd be more careful with LPS and SPS corals. I've never had one cause a problem with any livestock. Serpent stars, crabs, sea cucumbers have all moved right over them.








