very interesting behavior, I would caution on adding peppermints to a tank with anemones, it's not just aptasia they like, I have read on reef central how they have gone after BTA's, and here about them attacking a flower anemone, I considered them for aptasia control, but I am not going to go there.
"Maybe in order to understand mankind, we have to look at the word itself: "Mankind". Basically, it's made up of two separate words - "mank" and "ind". What do these words mean ? It's a mystery, and that's why so is mankind." ~ Jack Handey