Tower of God Wiki talk:Q&A/@comment-4076672-20120604142444

Also, there may be something like "species years" which was referenced randomly in some blog post. But until SIU clarifies things, lets just ignore it for now. Although it may explain why Anak is considered "300++ years old"(lizard years), though she's still older than Androssi.

Aha here.

From Ch 32: Age is only a number in the Tower so it isn't worth thinking about. People consider body age or species characteristics age important.