The ones I got today have not reapeared, still to early to tell. I still ahve others that I did not see till now. I used to have a peppermint that loved the things, never had a problem with them. The shrimp died about 6 mths ago now I have a ton of them. I bought 2 peppermint shrimp 2 weeks ago, HArdly see them and I don't think they have any interest in the Aiptasia. Bought another one today who is very sociable, allready all over the tank and not hiding. I am hoping he takes a liking to them. This all started with one in my fuge, shoulda killed it right away.