Comment by Mason Crain on July 24, 2011 at 2:10am

how long have you had yours and do you have any females because i have 2 juvis around 3 to 4 inchs and i wana know sex of them

Comment by D on July 24, 2011 at 3:49pm

Ive had mine for about 4/5 months now. I have 2 males, one female, and im not sure but the small one looks like hes gunna be a he. Jacks are kinda easy to sex. Their dorsal and anal fins grow long. If they are pointed and look kinda like there gunna attach to the caudal fin its basically a male. Female dorsal find kind of round off at the dorsal. Another thing is that a majority of the time the male will have red spots on top of their dorsal. But I wouldn't go by that. Mostly I go by the dorsal being pointed for males, and rounded for females. Are you looking to breed yours?

 

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