User blog comment:Chicken Bond/BIONICLE's Return?/@comment-3965075-20140731040850/@comment-24227188-20140802130452

Ihu: Good point. They're probably supposed to be like the Jumpers of Invasion From Below, and the Lord of the Skull Spiders is their master.

Ciaran: Um, no. Why would he have only one?

Ahpoiki: In storyline, it might as well be the size of Fenrakk from BIONICLE Heroes (maybe I'm pushing it there :P), and in set from, it's either the size of a Visorak, or Fenrakk. Good theory :D