Electric blue jack dempsey finnage

[Hybridfish7]

one thing I have noticed in EBJD's is the sort of veiling they get on their fins. what causes that? here's an example:

I quite like the long fins. I have also noticed that it's mostly in males from what I can tell, is that true?
If it is the case that males get the long fins, then that makes sexing juveniles alot easier, as I have noticed that juveniles with D shaped tails like this:

often grow up to have fins like the adult above.

 

[Chicxulub]

Wow, he sure is pretty

 

[YankeeJack]

Great pics! I chalk it up to genetics. I agree with your observation, in my experience, it is the males that tend to get those long flowing fins.

 

[Hybridfish7]

Woops i forgot to mention those aint my pictures but nevertheless they are pretty, and thanks for the info YankeeJack

 

[Red Cichlids]

Gorgeous fish!

I have a theory that the long fins is related to the extra blue color and might have to do with extra testosterone. I used to think it was due to hormone treatment at a young age, but having raised some up, I noticed their fins grew very long on regular fish food.

 

[tiger15]

I had several EBJD before and they all had deformity in the finage. All of mine died prematurely, with the oldest 3 years. The infertility and deformity are linked to mutant or hybrid genes.

 

[Red Cichlids]

That's right. I was just saying I think both the extra blue and the long fins are likely related to a mutation that causes them to produce extra testosterone, which itself could be the cause of their low fertility and vigor.

 

[jeaninel]

Hmmm interesting. So do you think mine is female?

 

[tiger15]

That's right. I was just saying I think both the extra blue and the long fins are likely related to a mutation that causes them to produce extra testosterone, which itself could be the cause of their low fertility and vigor.

Mutation, yes. Extra testerterone, no. EBJD is less aggressive than regular JD. Unlike FH that are more aggressive and grow bigger hump, evidence of extra testerterone.