has it laid eggs? If it's a female it should have layed eggs by now, it looks pretty big and seeing as Zhen Zhou females start to lay eggs around 3.4-4" in lenght, you should have seen eggs by now. Body shape leans towards female, but if you haven't seen eggs, I would guess it a male. Look at the tip of the vent. When it's sticking down if the tip of it looks like this U it's a female, if it looks more like this vv at the tip, then it's a male.
