Bannerfish?

I have seen a bannerfish at my LFS, i think they are pretty rare, not sure though. These are one of the marine fish i know next to nothing about. Are they algae eaters and how big do they get?

Nahh they aren't rare.
There are 2 types (most commonly just called bannerfish) that look almost identical, the schooling banner and the regular banner.
Regular banners will destory a reef tank and nip at algae a big, and grow quite large (around 8 inchesish) and likes lots of room, and don't like other banners. The Schooling banners however like to school with others of the same species and are completely reef safe, the rest of the care is the same.

How do you tell the difference between them?

There is a slight difference in head shape, I've never seen them mislabeled at a LFS though.

Okay thanks CP, i will try to get a pic of it and post it here.

Well hes gone so so much for that. They may get another one in though.

banner fish are quite small. not prefered by me.

Lol what is!?

Jk. You and your monster fish.