The vagabond butterfly has settled in nicely!
Some of my fish weren't too happy with the addition at first - the clowns were sure he was evicting them from their cave and decided to spend the night fluttering like miserable martyrs at the top of the tank. My puffer sulked behind a rock for two days straight because he was no longer the star of the show.
But now everyone has their attitudes sorted out and they're getting along together fabulously. No aggression whatsoever. Thanks!
-minerva.