As a National Geographic underwater photographer, Y. Zin is introducing high quality underwater photography techniques and underwater modeling education to Korea. A commercial photographer much in demand, she also produces photographic works for movies, posters, advertisements and magazines. Since 2012, she has been promoting the East Sea and the seas around Jeju Island, as well as the culture of the island’s women free divers through international dive expos and seminars. She holds a world record in sidemount trimix diving; she succeeded in diving down to 101 meters in 2015.