I have three axolotls. One male who is approx 25cm, one female who is approx 20cm, and another female who is over 30 cm.
The male was placed in the tank only recently, and I have noticed that he does not leave the 20cm female alone. They are everywhere together, and have completely left out the larger female..
I have seen them once or twice get into each others space and nip each other, but nothing serious.
My tank is large though, so as Joan said, maybe think about upsizing first!
(Message edited by Annas on October 12, 2006)