Age and sex of a pirate

[Lorebassi]

Hello everyone, i've got other questions for you. Look at this one, can you guess the age? It's a thb and has a plastron that measure only 6 cm long despite the ring on the shell suggest 4 years old. there is a reason for this or i'm wrong with age?

Next, sex, too young to say, probably male?

And you probably noticed its left foot, missing. is this a kind of congenital agenesis isn't it?