Can you predict how old are these males .. are they adults and capable of mating ?
The males are behind the females in the last picture ?
6 males in the first picture.
Mina, the ruler is not very easy to read. males are mostly 3 inch when they start mating behavior (fertile?), but i wait always until they are all grown up males 4 inch and females 5 inch and have a good weight. There is a nice article in radiata that covers everything. Vol.23, number 1, 2014 february. it depends on the females and they should be 300g at least. it is also about the health of the animals.i seperated my males since they went aggressive and the females are not ready.The pic with 3 males and 3 females they look nice size. I think you need to let "them decide", watch them and put them together...