I have a melanoid axolotl that's about 10-12 months old. I got this one with a batch of 4 others while they were all juveniles and about 2 inches long. It seems that most of them have grown to sexual maturity so I can identify their gender, but I'm not sure if my melanoid, Leal, is mature enough to sex or not. It looks like it may be a boy because it's cloaca looks slightly swollen, but it has a kinda divet at its base, so I'm not too sure.