Not always.I thought so too, based just on the shape (U vs V), but the tail is so short and there is no concave shell underneath - so kinda confused. At 6 years old, I figured those things would be more obvious?
At what age is he/she no longer sub-adult? And then what is the best way to know the gender?Not always.
I have an 8 year old that is a confirmed female but looks male. With a concave plastron and hourglass shaped sides.
I've given up guessing about the sex of immature RF long ago.
An immature male looks just like a female and some sub adult females look male.
I think they vary when it comes to sexual maturity. But at about 6 years. Give or take.At what age is he/she no longer sub-adult? And then what is the best way to know the gender?