Building on the considerable momentum from the commencement of the Decade of Ocean Science, the Ocean-climate nexus will be center stage at COP26. Many countries are including blue carbon Ocean commitments in their second round of nationally determined contributions (NDCs), and there is a need to harmonize the science, law, and economics of Ocean-based climate mitigation and adaptation strategies to enable implementation of Ocean commitments under the Paris Agreement. In addition, consistent with the Paris Agreement preamble’s focus on human rights, the rights and empowerment of vulnerable and marginalized communities, and intergenerational equity, the design and implementation of Ocean commitments in NDCs should be centered on considerations of climate justice (“climate-just Ocean commitments”). The challenges and opportunities inherent in implementing climate-just Ocean commitments require a comprehensive review of the latest innovations in blue carbon scientific research, the