scratch that last post. I'm guessing you went to the iBlueWater site?
SB means Spawning/Breeding. They have laid eggs in the past
BR means breeding size pair. They are old and mature enough to lay eggs, but haven't. Side note: I hate it when people call these pairs breeding. They're not a breeding pair if they haven't bred before.
BD means bonded. They get along, one is female, one is mail, but they are either to small to breed or haven't been together long enough.
On another note... If you order from iBlueWater, tell them to change their picture on the front page. It is obviously photoshopped and looks ridiculous.