I've always thought there were slight differences in the blue gene carrying JD's, But when it boils down to it, there really isn't. This is why EBJD breeders usually always cull the non EBJD fry. My regular JD's are the offspring of EBJD x BGJD, but I don't think any of them carry the BG even though I was told by the guy that sold them to me they were. I think this, because I've yet to get a single EBJD fry from even my EBJD and his mate. So I'm pretty much giving up on all that. Gonna try and sell most of my stock and move on. Just not that into it all anymore.