I'll confirm that they are not tagged as Magical Beasts, but I cannot confirm if they are
supposed to be Magical Beasts or not...meaning I don't know what the design intent behind them was.
They are currently tagged as
Aberrations, which may have been intentional to reflect some oddness in their physiology...or perhaps they're the product of someone's experiments.
So for now I'll put this in the "unconfirmed" category.