SEALIVE aims at demonstrating innovative circular strategies for bio-based plastics in land and sea applications. The project will be driven by economically and technically sustainable business models based on materials with advanced properties, design for circularity techniques and end-of-life solutions. It will establish a partnership of raw material providers, convertors, end users, recyclers, policy experts, certification organizations and NGOs to demonstrate solutions within a shared vision for circular plastic strategies. Solutions for reusable, recyclable and biodegradable bio-based plastics to prevent and significantly reduce marine pollution of all kinds will be demonstrated in four pilot territories: Cyprus, Ireland, France and Denmark (or Non-European site). Innovative formulations based on PHAs, PLA and starch materials with advanced properties will be developed following recycling, biodegradability (marine and land) and composting standards. Design for circularity techniques (recyclable multi-layer single packaging materials, digital materials for traceability) and End-of-life solutions (high precision NIR-based mechanical recycling, controlled biodegradation/composting in natural and industrial conditions) will be upscaled at TRL6. Solutions will be applied to 8 end-applications with high potential for pollution reduction of soils and water media: rigid food containers, flexible packaging, agricultural films, fish crates, fishing nets and aquaculture mesh bags. Pre-normative research will be carried out to improve current standards for biodegradation, composting and recycling with regards to eco-toxicity, safety and influence of plastic ageing. Policy recommendations at EU and global level will be provided in order to build a common framework enabling pollution reduction of land and sea via sustainable bio-based plastics solutions.