Turtles, bears and crocodiles. Tropical forests, fathomless caves and precipitous ice cliffs. These are just some of the many fascinating motifs captured on camera in the underwater photography of Michel Roggo. The Swiss photographer has traveled the world to take pictures of all major freshwater types. An exhibition in the Zoological Museum of the University of Zurich featuring over 900 of his photos presents a beautiful underwater world awash with light.