Actually I think I have read some where they have been placed in the Tomato complex. I know my pair have been in my tank for little over a month and they are still skittish. I don't know if it ever goes away, so far it hasn't. I'm not sure what having an anemone will do to their behavior, but I plan on getting one here in the next week or two. I did not know there are tank bred nigripes, that would be cool if they began to reproduce them enough to supply the hobby.