Ever walk in the waves or swim in a pond and have something brush by your feet? Maybe even a little bottom feeder fish come clean your toes if you’re standing still? You don’t really have to worry about that in Antarctica, you won’t feel a thing because your feet will be completely frozen and numb.
Sometimes swimming out in the ocean I freak myself out. Imagining how deep the water is where I am, how large of creatures could be swimming under me. It really makes you a fast swimmer. When I was little I would even do it in the pool, imagining some large beast at the bottom coming up for my legs and I’d race for the steps in the shallow end popping up out of the water almost the way a penguin does.