Coast 4C

Coast 4C scales-up protection and restoration of coastal habitats and boosts local incomes by leveraging the global boom in seaweed demand.

Through improved gender equitable livelihood opportunities in seaweed aquaculture, Coast 4C empowers marginalised coastal communities to become good stewards of coastal resources, leveraging their unique local ecological knowledge and connection to the environment to help protect and restore coastal ecosystems and replenish fish populations.

Accessible financial and technical services are provided to enable sustainable seaweed farming practices that enhance yields and quality, whilst improving climate resilience. Coast 4C provides a guaranteed buy-back of sustainable production at a premium price, ensuring communities that demonstrate good stewardship are rewarded, while feeding global demand for responsible seaweed.

Shortening the value chain and introducing efficiency improvements and traceability enables Coast 4C to create a profitable business opportunity whilst delivering impact across the 4Cs of Community, Commerce, Conservation and Climate.

How they are addressing Climate Change

Climate Mitigation

  • Protection and restoration of 407 hectares of blue carbon habitats are estimated to avoid approximately 11,200 tonnes of CO2 emissions annually.

Climate Adaptation

  • Protection of 5,868 hectares of coastal zones through eight locally managed marine protected areas, increasing protection from less than 1% to 17%, with each area about 450 times larger than the national average.
  • Around 60,000 people have benefited directly from reduced marine plastic pollution and improved coastal management.
  • Disaster risk mitigation plans and climate-resilient guardhouse infrastructure have been implemented to safeguard vulnerable livelihoods.
  • Single-use plastics have been eliminated from seaweed farming, with reuse and recycling programmes significantly reducing local marine plastic pollution.

How they are creating Shared Economic Prosperity

Economic Wellbeing

  • Improved seaweed farming has boosted yields and incomes for 680 households. GROW farmers saw mortality drop from up to 80% to under 10%, enabling 100% of year-one farmers to return, double their investment, and triple farm size. Seaweed farming remains a vital income source, especially for low-income households.

Equity and Access

  • 77% of farm input package recipients are women, and female representation in fisheries leadership has increased from 10% to 30%. The iMPA model and GROW programme embed local knowledge and prioritise community-led implementation, expanding opportunity for underserved groups.

Economic Resilience

  • Coast 4C co-develops digital tools and low-cost sensors with farmers to improve decision-making and reduce losses. Regenerative seaweed farming, paired with community-led conservation, helps build long-term ecological and economic resilience to climate and market shocks.

Financial Inclusion

  • Coast 4C has enabled financial inclusion for 8,800 people—82% of whom are women—by providing access to locally appropriate savings and loan services. Financing for farm input packages and the use of digital traceability tools help smallholders build credit histories, improving their bankability and unlocking access to formal financial services.

Learn more about Coast 4C

Download our full report to discover the business models, financial mechanisms and investment opportunities behind Coast 4C.

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Enquire about Partnerships

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