My acan has been going down hill for the last month or so. I dipped it after it started to not be puffy. I have since dipped twice and these are the worms I find. There’s probably around 20 or so each time. They aren’t on my hammer or torch coral.
They are bristleworms. Probably eating some already dead part of the coral, or some leftover food, or something dead was in the coral. They wouldn’t bother live corals.