The main objective of the World Marine Mammal Conference (WMMC 2019) is to promote dialogue and scientific debate at a high international level on the present and future of marine mammals. This world sumit will take place from December 9 to 12 in Barcelona under the organization of the University of Barcelona and SUBMON Association.  With the logo "Together for science and conservation",  WMMC 2019 will gather 2,500 attendees from 95 countries -researchers, conservationists, students, managers and other professionals- in a program involving 700 oral presentations, 1,200 posters and plenary sessions on climate change and marine mammals, conservation of endangered species and current and future challenges in research and population conservation.