The Marine Seaweed Aquaculture Risk Assessment explores environmental and social risks associated with large-scale marine seaweed farming in Australia. It uses the National Ecologically Sustainable Development Framework to evaluate a hypothetical 200-hectare farm cultivating native species. The study emphasizes responsible site selection, biosecurity, and management practices to minimize environmental impacts and meet regulatory expectations. It highlights seaweed farming’s potential to address sustainable development goals through nutrient mitigation, job creation, and methane reduction in livestock.