Migrating reefs, unprecedented species assemblages, neophytes, toxicities, pollutants, aquatic ruins – The future of coral reefs in the Anthropocene is likely to look different from anything we have experienced so far. While the classic conservation debate on coral reef restoration still treats these ecosystems as “sick patients,” a radically different view of convivial conservation is beginning to challenge exclusive human control over these endangered habitats. Putting aside notions of natural “purity” and adopting a much more humble and highly interconnected perspective on marine habitats, we can begin to see reefs as transformative, sympoïetic and blasted seascapes for a convivial future. The discipline of biodesign has been primarily focussed on researching ecological relationships with regard to new materials and products. The emerging interest in shaping the multi-layered ecological relationships of habitats for other-than-human lives, however, is steering design practice towards terraforming or, in the case of marine environments, “aquaforming.” This paper argues for taking convivial conservation practices in marine environments as a starting point for the development of a new design methodology that focuses on the design of living systems in open environments: a proposed methodology called Sympoïetic Design.