I agree that the blue one is still small. I have seen Kenyi start changing colors as small as 2 inches so I would think if it's a male it may be coming soon. As far as changing gender, I don't think that's correct. There is a speculation that kenyi might be able to change gender but there's no proof of it.I wouldnt be so sure the Kenyi is a female. It has female colors now but it is still small. They usually don't get into their male colors till about 3-4 inches. Also Kenyi are known for changing sex before maturity.
Acei are very difficult to sex since males and females look identical. Venting is the only way to know for sure.
I know it is off the topic but there is proof of changing sex...I will have to dig it up but there is an old post by liv2padl here on AC with documentation on Mbuna changing sex. I have also personally seen one of my Kenyi do so.I agree that the blue one is still small. I have seen Kenyi start changing colors as small as 2 inches so I would think if it's a male it may be coming soon. As far as changing gender, I don't think that's correct. There is a speculation that kenyi might be able to change gender but there's no proof of it.
As fr as aggression goes, fish don't read books and don't always follow the rules. Generally acei are more peaceful but sometimes there are ones that are more aggressive. Just like generally Kenyi are aggressive but sometimes there are passive ones.
then i may be confused, but the point is moot as i had to take the lombardoi out of the tank as the acei was gonna kill it... i never saw this amount of agressin when they were all in the little 30 hex... i moved them into a 75 with lots of rocks and caves and that thing went ballistic
I know it is off the topic but there is proof of changing sex...I will have to dig it up but there is an old post by liv2padl here on AC with documentation on Mbuna changing sex. I have also personally seen one of my Kenyi do so.