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Sex distinction melanocromis johanni

PostPosted: Wed Jan 20, 2021 6:14 pm
by Orlix76
Salve, piacere di far parte di questo forum, vorrei un consiglio dai piu esperti.
Ho 4 esemplari di melanocromis johanni lunghi circa 4/5 centimetri
2 presentano una colorazione arancio scura e 2 una colorazione violacea leggermente sbiadita.
Mi sapete dire il sesso?
Provo ad allegarvi delle immagini.
Grazie in anticipo

Re: Distinzione sesso melanocromis johanni

PostPosted: Wed Jan 20, 2021 9:30 pm
by DJRansome
Welcome to Cichlid-forum! Are you able to post in English?

Re: Distinzione sesso melanocromis johanni

PostPosted: Thu Jan 21, 2021 12:42 am
by Orlix76
Hi, nice to be part of this forum, I would like some advice from the most experienced.
I have 4 specimens of melanocromis johanni about 4/5 centimeters long
2 have a dark orange color and 2 a slightly faded purplish color.
Can you tell me the sex?
I try to attach some pictures.
Thanks in advance

Re: Sex distinction melanocromis johanni

PostPosted: Thu Jan 21, 2021 9:25 am
by DJRansome
Female johannii are yellow orange. Male johannii are blue black. Here is the link to the Cichlid-forum profile. https://www.cichlid-forum.com/profiles/ ... php?id=760

Re: Sex distinction melanocromis johanni

PostPosted: Thu Jan 21, 2021 9:41 am
by Orlix76
Thanks for the reply. Is sexual dimorphism very pronounced even when they are still small, as in my case? Do they tend to change color?
Are they already different in color when they are little?

Re: Sex distinction melanocromis johanni

PostPosted: Thu Jan 21, 2021 9:47 am
by DJRansome
Juveniles are all yellow orange and the males turn blue black as they mature.

Re: Sex distinction melanocromis johanni

PostPosted: Thu Jan 21, 2021 9:53 am
by Orlix76
Out of four specimens, do I have any hope of finding a male and a female?
the photos I posted are not indicative of gender, because my specimens are still too small ... right?

Re: Sex distinction melanocromis johanni

PostPosted: Thu Jan 21, 2021 12:39 pm
by Fogelhund
Orlix76 wrote:Out of four specimens, do I have any hope of finding a male and a female?
the photos I posted are not indicative of gender, because my specimens are still too small ... right?


Yes, they are still too small. Out of four specimens, odds are you have at least one male, and one female. Depending on your aquarium size, and other fish in there, you will probably want anywhere from 3-6 females, for each male, as they can be very aggressive.

Re: Sex distinction melanocromis johanni

PostPosted: Sat Jan 23, 2021 11:39 am
by noki
Yes, in a young group the most dominant male or two can start turning darker before being sexually mature at 4 or 5 cm. Depends if there are larger other males in the tank.