Spinax

Spinax is Maxilos' energy hound, and has been accompanying Maxilos for a very long time. He is referred to as an energy hound because he can track down the location of anything, even a single mote of dust, by sensing its energy. Greg Farshtey has also stated that Spinax will fight the Makuta of Metru Nui. He is also amphibious because of the Pit's mutagen. Aside from that, nothing else is known about this mysterious creature.