Banggai Cardinal Fish - 1 or 2 in a tank?

[Myka]

You just have to take the seller's word for it. You can't tell. If there's a whole whack of them there and they're all pretty small, and pretty much the same size as eachother that's a good sign that they're captive bred.

I also agree that one on its own is the best. Unless you get a pair that suck at breeding. Like mine. The male just swallows the eggs within the first couple days. They breed all the time, but unless I intervene the eggs don't make it to term. Caviar anyone?

Mine are very shy. They both hide in the back. People see my tank, and ask me why there's no fish. "Well actually there are four fish in there, they just hide." My tank is in my bedroom though, so they aren't used to foot traffic all the time.