I know it is dificult to determine the sex of axolotl when they are young..but your random guess?lulu is about 5 inch..
10292_499310456760773_1340432033_n_zps505390ed.jpg photo by Lamina6 | Photobucket
10292_499310456760773_1340432033_n_zps505390ed.jpg photo by Lamina6 | Photobucket