Are Banner (heniochus) fish reef safe?

According to a LFS that I was at last week he was selling the Banner fish as reef safe. Ok, I didn't realize (according to aquatic connection) that they feed on zooplankton and are in fact reef safe. If anyone can dispute this I'd like to know as I might buy a few. Thanks.
Butterfly Fish, saltwater fish aquarium - Aquatic Connection

 

The schooling banners are but the long fin banners aren't.
They're really difficult to tell apart.

 

In fact I have never seen a schooling bannerfish for sale, local or online. I think this has to do with the difficulty in telling them apart; companies sell them as not reef safe "just in case."

 

The reef safe ones have a blackish clear side fin. The ones with a yellowish side fin are not. The latter are the only ones i ever see for sale.

 

They are coral nippers from what ive been told. And ive never seen a schooling one for sale just the non-reef safe ones.

 

There are actually about 6 species that look almost exactly alike. The only one that is 99% reef safe is the Heniochus diphreutes. As with any fish... there is always that one.

 

Thanks for the info. I'm going down to the store tomorrow and take another look. They might be gone as I saw them there last week. They had 5 or 6 of them together for $40 each.