70shw Posted February 7, 2012 Report Share Posted February 7, 2012 Hey guys and girls, I have a few Jack Dempseys (about 20 lol) most are still juvies but I was wondering how do you determine the sex of a JD? And also how big do they have to be until you can tell? Any help would be appreciated, Thanks guys, Jamie Link to comment Share on other sites More sharing options...
MRNOS Posted February 7, 2012 Report Share Posted February 7, 2012 boys normally have just dots around the face/eyes/chin, girls have more of a smudged blue colour, not the best way to sex them, especially when small Link to comment Share on other sites More sharing options...
jabmel Posted February 7, 2012 Report Share Posted February 7, 2012 correct, at least 6-10 cm before and this is then only a rule Girls have blue on their chin more colour on the face Boys do not have dots or blue in a line from under their eye but have more body colour and appear bigger but I have had girls that look like boys and boys that were actually girls the only true way is the one that lays eggs is the girl watching them from about 5 cm to 7 cm you will see pairs stay together, this is also away Ben Link to comment Share on other sites More sharing options...
