Yes they are problematic.....I have probably 50 or so in my 90, 5 or 6 of them are the same big ones throwing out webs, always hit by a knife or my hands imbedded into them, crushing them. Its an ongoing battle, bought Bumblebee snails but they prove to be opportunistic on any food given to tank. Lazy bunch lol....Thanks! I thought its a coral but then I saw the opening and the classic mucus thread.
Is it a problem? should I do something or leave it alone? I have quite a few of the small ones
They don't kill coral, but they irritate, I have enough coral irritations without them . Sorry about the kill shots on your dusters....Copperbands are a beauty fish..If I may ask why are they problematic?
Its a shame that copperbands do not eat them as mine devoured all my featherdusters