Book excerpt: The marine areas beyond national jurisdiction (ABNJ) comprises 40 percent of the earth’s surface, it covers 64 percent of the surface of the ocean and 95 percent of its volume. The Common Oceans ABNJ Program (2014-2019) was implemented by FAO as a concerted effort to bring various stakeholders to work together to manage and conserve the world’s common oceans. The ABNJ Deep-Sea project, one component of the Common Oceans ABNJ Program, was of great assistance to newly-formed regional fisheries management organization and arrangements (RFMO/As), as well as some long-standing regional fisheries. The project showed positive results in safeguarding vulnerable marine ecosystems, strengthening monitoring, control and surveillance to combat illegal, unreported and unregulated fishing, mitigating bycatch mortality trends, and building awareness of cross-sectoral aspects in effective governance of ABNJ. Through its cooperation with RFMOs, the project has, to some extent, contributed to minimize the negative impacts of bycatch. Results achieved should be capitalized on and upscaled in a second phase.