I had a peppermint shrimp that once it irradicated the few aptasia I had at the time went to work on a Torch frag, then an Acan, and finally some Tubbs Blues, all in one day. It was like it was having a raging fit and had to destroy anything in it's way! I removed it to a quarantine tank that had a Magenta Dottyback that quickly made shrimp scampii out of it. Needless to say the Dottyback did not go into the display tank, and now I wish I had that peppermint to take care of the many aptasia I now have. the P.S. I have now has no interest in aptasia.