Interdisciplinary marine science is pivotal for addressing ocean sustainability challenges. One research team asks: “does it bring together individuals and groups from diverse socio-economic, cultural, or identity backgrounds, or does it favor only certain groups?” This paper argues that minority groups still face systemic barriers, discrimination, and elitism in the field. It synthesizes three key messages: (1) diversity is essential for high-quality interdisciplinary marine science, (2) interdisciplinary research can add unique challenges for minority groups, and (3) the field risks exclusion, prejudice, and elitism without deliberate DEI action. To address this, the authors present ten recommendations for building more inclusive, equitable, and representative research communities. For them, fostering DEI is an ethical imperative for tackling pressing global ocean challenges. If we can value diverse voices, knowledge systems, and lived experiences, interdisciplinary marine science can advance more just, innovative, and impactful solutions for ocean sustainability. To learn more, click here.