In the frigid waters surrounding the Antarctic peninsula lives the elusive maguma. While it may resemble a strange cross between a manatee and a walrus, the maguma is actually a species of bradypod sloth, having diverged from South American tree sloths 5-1o million years ago.

It may come as a surprise as to how this animal came to be, but one must remember that tree sloths today are already adept swimmers, and can move three times as fast in the water than on land. The ancestors of magumas became suited for venturing out into the ocean between South America and Antarctica, feeding on a vast and untouched food source - seaweed. These animals now live a life similar to manatees, being semi-social but occasionally gathering in loose groups.

In the millions of years that followed, these animals are now hardly recognizable as sloths, being as large as a car, lacking fur, and having a pair of walrus-like tusks. While these features may be strange for sloth standards, they are absolutely necessary for living in the freezing waters. 

Magumas have much faster metabolisms than their tree-dwelling cousins, granting them a higher body temperature that, paired with their blubber, provides exceptional thermal insulation.