Cryptoheros Panamensis

[Fishy Smell]

I currently have 2 juveniles from different sources.

1 has taken on a total black colour, the other a bit of red, grey, blue and colour on the dorsal.

Are they easy to sex?

I have some big reputation cichlids in my tanks but i think pound for pound these are the most agressive i own.

Does anyone have any experience on this breed that they want to share?

Thanks.