What do you feed your fish?My acros do that as well when I stir up detritus in the tank, they’re mesenterial filaments I believe. I haven’t figured out yet if the corals are angry or if it’s some kind of response to stimulus. They don’t do it when I feed the fish, it’s only when I stir up the stuff under the racks in the tank. Good observations for sure.
I buy mussels live from seafood market, they keep about a week. When I dice them up and feed the fish, everybody gets mussels live gut bacteria and the feathers come out. I especially enjoyed the dance of the Sea Apple.

