Yeah, a copperband butterflyfish. I personally would go with the peppermints unless you have something that will eat them. I had probably 5 large aiptasia and countless little ones all over my 55 gallon and then I got 5 peppermint shrimp to take care of them. About a month later there was only one left and within a few more weeks that last aiptasia was gone. Plus the peppermints will breed every couple of weeks and their little ones are great fish food. Now my only problem is my sump is full of aiptasia, but I don't really want to put peppermints down there where they will eat my pods and stuff too. I think I am going to get a 10 or 20 gallon with a couple shrimp in it and move rocks to it for them to clean the aiptasia from.