I had recently purchased two EBJD's from a fellow MFKER(at around 3-4inches) and I've been growing them out together. I'm not quite sure on their family lining but I assumed that they were siblings. One is clearly a male with a larger body whereas the other was slightly smaller. I had also assumed at first that they were also both male (both had relatively sharp fins). I had planned to grow them both a bit bigger and then pairing them with some female BGJD's that come from a completely different line. However, as of lately they move together and are almost inseparable. This was not the case when I first got them, one chose the right-side and the other chose the left side of the tank. Now I suspect that the smaller EBJD might have been a female and my worst case scenario is that they've actually paired already. How can I tell for sure if they're paired or just schooling together?