Hello everyone, I was woundering if I could get some help with the sexing of my Jack Dempsey. From what I've read the most assured method is by there coloration, is this true? If so I am fortunate enough to be color blind which makes this much harder for me. 
I keep looking into breeding them more and more and I feel I have an exquisite candidate. I've had him for a couple years since he was a baby, currently in a 55 long by himself, and its over-filtered.
He is extremely healthy and prefers to decorate his tank him/her self as you can somewhat see in the picture he has dug out alot of the gravel to the tank bottom. Perhaps a sign of readiness to breed?
If this picture does not suffice I will obtain better ones later today.
Thanks for any help!

I keep looking into breeding them more and more and I feel I have an exquisite candidate. I've had him for a couple years since he was a baby, currently in a 55 long by himself, and its over-filtered.
He is extremely healthy and prefers to decorate his tank him/her self as you can somewhat see in the picture he has dug out alot of the gravel to the tank bottom. Perhaps a sign of readiness to breed?
If this picture does not suffice I will obtain better ones later today.
Thanks for any help!
THANKS AGAIN!