Hes about 28cm which is roughly 11" I think? He used to come out a lot more than he does now, but I used to give him a lot more live food than I do now. He killed the female not long ago but even before that he was skittish. Even when they had fry to protect he would hide from me lol. Few months ago I'd forgotten I'd set the heater low so I turned it back up and still didn't make much difference in his activity.