The Caribbean is facing growing environmental pressure from the massive arrival of sargassum: brown seaweed that washes up on the coast in large numbers, weakening coastal ecosystems and affecting fishing, tourism, public health and the daily lives of island communities. It is against this backdrop that the SARSEA – Sargassum Regional Strategies for Ecosystem-based Actions project was officially launched on October 28, 2025 in Saint Lucia, marking a turning point for regional management of this challenge.
A structuring framework and committed partners
Financed by the Agence Française de Développement (AFD) and implemented by Expertise France in partnership with the Commission of the Organization of Eastern Caribbean States (OECS), the SARSEA project offers the states concerned a framework for cooperation, knowledge and action.
The SARSEA project will focus on a number of key areas:
- – Strengthen regional cooperation on Sargasso planning and management, to improve political coordination and international visibility of the phenomenon.
- – Support small island states – notably Dominica, Grenada, Saint Lucia and Saint Vincent and the Grenadines – in implementing integrated sargassum management and recovery initiatives, adopting a circular and sustainable approach.
- – Support regional scientific cooperation to better understand the phenomenon, anticipate its effects and guide management strategies.
- – Integrate the gender approach into all Sargasso-related policies and actions, to ensure an inclusive and equitable response.
The launch: a key moment for dialogue
The opening ceremony in Saint Lucia was attended by governmental, institutional and scientific representatives from all over the Eastern Caribbean. Among them were the French Ambassador to the Eastern Caribbean, Barbados and the OECS, Marie-Noëlle Duris, and the French Ambassador for regional cooperation in the Atlantic zone, Arnaud Mentré.
Dominica stressed the need for a coordinated, multi-level approach to Sargassum management, citing the role that each island can play in a value chain adapted to its capabilities. Saint Lucia reaffirmed its commitment to playing an active part in this collective response. Grenada, for its part, put forward several priorities: the creation of a regional testing center, the implementation of a grounding monitoring system, a harmonized collection mechanism and a strengthening of sanitary monitoring.
During the event, a partnership protocol was signed between Expertise France and the OECS Commission, reinforcing the institutional framework for regional action. Round tables addressed the national visions of partner countries, followed by the challenges and opportunities of regional cooperation in Sargasso management. The afternoon was devoted to a presentation of the project strategy and a coordination meeting of partners. The following day, participants took part in a collective scientific workshop led by the Institut de Recherche pour le Développement.
Towards a shared Caribbean strategy
The SARSEA project aims to consolidate a network of public, private and scientific players in the region, with a view to pooling skills, data and best practices. The objective of the SARSEA project is clear: to improve preparedness and response to Sargasso groundings, while strengthening the resilience of coastal territories.
Under the SARSEA project, although four states will benefit directly from the project, all twelve OECS member states will be able to take advantage of the lessons, tools and best practices that emerge. This reinforces the regional and inclusive dimension of the action.
Why is this project so important?
Massive sargassum groundings in the Caribbean are not an isolated phenomenon: they disrupt coastlines on a daily basis, affect people’s health (toxic gas emissions during decomposition, respiratory problems), weaken marine ecosystems (seagrass beds, corals, mangroves) and threaten key economic sectors such as fishing and tourism.
In this context, fragmented or national management alone is no longer enough. The phenomenon crosses borders, currents and ecosystems. The SARSEA project proposes a coordinated, sub-regional response based on robust science.
Future milestones
- – Structuring integrated value chains around sargassum: from collection to valorization (possibly into bioproducts, fertilizers, etc.).
- – Set up harmonized monitoring systems for strandings, collection and sanitary analysis.
- – Deployment of concerted scientific actions to fill knowledge gaps and guide better-adapted public policies.
- – Promoting women’s participation and gender mainstreaming in all phases of action.
- Dissemination of project feedback, tools and best practices to all OECS member states.
The launch of the SARSEA project marks an essential step in the regional mobilization against the impact of sargassum in the Eastern Caribbean. By combining political, scientific, technical and inclusive cooperation, the island states now have a structured framework for tackling this complex phenomenon. The SARSEA project does not replace national or local work: it amplifies and structures it, giving it scope and resources. With this new impetus, the prospect of concerted, better-informed and sustainable management of sargassum is taking shape in the region.
