We are proud to announce that 3rd World Conference on Marine Biodiversity (WCMB-2014) will be held from October 12-16, 2014 in Qingdao, China with the theme of \'Life in the Changing Ocean\'. On behalf of the organizing committee, I cordially invite you to attend this conference and come ready to discuss exciting new ideas and achievements in this field. WCMB-2014 will take the form of keynote lectures, oral presentations, posters and exhibitions. It will cover topics from recent breakthroughs in Marine Biodiversity. WCMB-2014 will continue to provide a platform for marine scientists to debate on the issues affecting the progress of this emerging field and identify the challenges and opportunities facing the development of marine biodiversity. We have six themes Marine Biodiversity & Global change Marine Ecosystem Structure & Function Marine Ecosystem Safety Marine Biological Observation Marine Biological Resources Deep sea Biodiversity