Sexing EBJD

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Also if youre at a LFS and is looking for a nice male, make sure to pick ones that does not have a slender long body, those in the long run will be tank skippers, also try picking fishes with longer anal and dorsal fins, it gives you a higher chance of getting a male. Also stay away from long head EBJD-when mature they can turn into a beek, Stay away from weird looking eyes that are not balance. Make sure all eyes are level. Make sure your EBJDs has solid blue colors all over with less GOLD. The GOLD WILL EVENTUALLY go away which will make your fishes look like a normal JD. I have seen several Jacks at local pet store that are selling really low quality hybrids as EBJD's. Stay away from those!
 
i agree with Andrewtfw . i've actually had a female ebjd and when she was next to the male i had you could not tell a difference other then he grow faster then she did. so they are out there . i never had a chance to grow them out in order to breed them like i wanted to thou .
 
I just have to add one thing. I have a female for that I'm sure. She is very very mild and is usually the one that's bullied by my male parrot fish. Heres a pic. she's a very slow grower but a HUGE pig.

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I have never vented. I can tell by looking at them usually. Males tend to have more elongated bodies, and longer dorsal and anal fins,(but not always). I think the longer you breed them, and the more you see, it become easier and you get the feel of it.
 
Well, for the regular jack dempseys I can tell easily, but for the EBJD, I would say its Im still sometimes wrong with sexing them. I thought I had a *** couple of two males.. both had hump, longfins, long body, etc...turns out to be one male one female...Took them about 2 years before I saw eggs from one of them..I immediately took out the female and pair her off with a BG male...but hey...sometimes it is..some times it isnt...lol..
 
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