apistia usually dont close up like a zoa does put pull back in on itself it a crevice
hydroids do that same thing sometimes and to me looks more like what you had instead of aipistia so keep an eye on them they might not be dead.
Mike
You could check em with some joe's juice if its aip it will die deff. And theres a fish that eats them copper banded something i think not sure witch one. If it is aiptasia then if its sprouting like that it might not hurt to pick up that fish.
copperband butterfly, i had one a while back but im not looking to get another one, i have 3 peppermint shrimpin the tank, im hoping one of them will take care of it if any more pop up.