I've noticed that the two yellow spots on Scylla's head get smaller and smaller w/ each shedding, and eventually they'll disappear entirely, which made me wonder (don't ask where it came from)...

Are there any terms for age ranges for snakes, and how do you tell where they are on the "Age Number Line"? On the far end you have "adult", on the other end is "hatchling", but what about the stuff in between? I've heard terms like "juvenile", "sub-adult", and the like, so I'm curious when Scylla can be expected to move from kid, to teenager, to all-grown-up, to cranky old grandma....