Idk my girlfriends tank got a few of those when she got new live rock I was told by my lfs to remove it but I've heard otherwise I heard mostly to zoas there dangerous but there slow to populate unlike apitasia so really you can do either lol
I found another one and i believe they are gonna have to come out...im pretty sure they are pseudocorynactis (or however you spell it) and in that case multiply by fission and when large enough pack a powerful sting and will catch and eat your fish, and if im not mistaken they are soft corals not anemones...does anyone no for certain that they are something else? I would like to keep them but i will not if they are any danger to my fish or my condy
Its a Strawberry Nem and should be removed from your tank. They multiply, but don't overtake your tank like normal Aiptasia will do. You would kill it like you would any other Aiptasia.