Spinax

Spinax was Maxilos' Energy Hound, but belonged to Hydraxon, and had been accompanying Maxilos for a very long time. He is referred to as an Energy Hound because he could track down the location of anything, even a single mote of dust, by sensing its energy. He is also amphibious because of the Pit's mutagen. He responds to the command "Manas Zya" by attacking Hydraxon's enemies.

Spinax attacked Teridax/Maxilos in BIONICLE Legends 8: Downfall under Hydraxon's command. He now works with Hydraxon in capturing escaped prisoners through the pit.