These stunning images show the results of one man’s 400 hours of swimming in the coldest waters in the world
A medusa or jelly Desmonema glaciale. It lives near the surface and the bell can reach over one meter in diameter.
Source: http://www.telegraph.co.uk/news/earth/earthpicturegalleries/6760742/Extreme-diver-Norbert-Wus-journey-into-the-Antarctic-underworld.html
