The Polar Cerberesi resulted from a population of Cerberesi that moved further south. They have changed little from their ancestor, only growing larger and developing antifreeze-producing organelles. Their larger size allows them to feed on larger prey items like the ambulagnia and Binucleusphotoedo rami, and the antifreeze allows them to survive in the cold waters that they occupy. They are darker in color due to their diet of polar photosagnia species. Because most of its prey dies off during the winter, the polar cerberesi will enter a state of inactivity, reducing its metabolism dramatically to make up for the lack of food. If it detects prey nearby in this state, it will increase its metabolic activity and catch the prey before entering a state of torpor once more.