If you want to breed EBJD's you will need EBJD not related to each other or a EBJD and a BGJD again unrelated.
The EBJDs have a very weak gene and usually dye as day old fry.
We are breeding EBJDs at the moment and are breeding 2 unrelated BGJD;s together and keeping the 25% EBJDs it will produce the rest will be 50% BGJD and 25% JD these we will be culling as there is no way to tell them apart. Once the EBJDs are old enough to breed they will be bred to regular JD's to produce BGJDs to strengthen the gene pool before being bred to unrelated BGJD/EBJD.
The survival rate is very poor for EBJD due to the fragile nature of the gene's. If you do want to seriously breed these fish you WILL have to cull, they have a lot of problems including beak mouth amongst others. If you can't face culling any fish DO NOT breed them, there are enough people out there that do not and a selling unhealthy fish and weakening the gene pool further.
Here is a website i would advise you look at and read all that you can.
http://bluejax.14.forumer.com/index....6e371868ef30b3
Good luck if you decide to breed them. (If you want more info PM me)
Anna