The oceans are of crucial importance for the climate, ecosystems, food security, and trade. Despite this, the unsustainable use of marine resources is undermining the health and resilience of marine ecosystems and species around the world. What can be done to change this? Florian Lennert joined the RIFS as a Klaus Töpfer Sustainability Fellow in April 2024. In this interview, he explains his plans for a platform to develop sustainable marine technologies.