Well, when I run into a beginning aquarist I always recommend staying away from angels and butterflies until they have some experience, most newbies get carried away by the beauty, design and color of these fish and most fail at their attempt to maintain them, with them I always handle them as difficult fish although you are right in saying that a well cared specimen must be found, this is practically more than half the work, they also require a lot of attention from the aquarist to continue maintaining those standards be careful with delicate fish, since the effort of a well quarantined and fat fish would be of no use if it's going to arrive in a tank with insufficient equipment and poor or regular water quality.It’s annoying when people say they’re ‘Hard to keep’ because they really aren’t when you get the right specimen, same with any of the wrasse such as A. femininus - A dream wrasse of mine with the most money on its price tag too haha. I’m a complete freak for the wrasse and it started with just a Jade and Lubbock fairy.. I now have 8 wrasse total