The 6th International Billfish Symposium (IBS) was held in September 2016 at IGFA Headquarters and co-Chaired by IGFA Conservation Director Jason Schratwieser. In addition to providing a venue for presenting new research on istiophorid and xiphiid billfishes, the IBS’s objective was to highlight known uncertainties about the biology and fisheries of these species, particularly at the level of regional fisheries management organizations, such as the International Commission for the Conservation of Atlantic Tunas (ICCAT). The 6th IBS was attended by 60 participants from seven countries, contributing a total of 34 oral and five poster presentations. One of the other goals of the IBS was to collectively develop a plan for future IBS events.