The Sargasse Project: Transforming Seaweed into Sustainable Materials
sargasse st barth


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The issue of sargassum seaweed has been a major concern for many Caribbean islands over the past years. However, in St Barths, a local entrepreneur has taken a unique approach to address this problem: by turning the seaweed into a valuable resource through his Sargasse Project. Here, we take a closer look at the project, its progress, and its potential to benefit not only St Barths, but also other Caribbean islands facing similar challenges.

Background on Sargassum Seaweed

Sargassum seaweed is a brownish, free-floating algae that can grow in massive blooms in the Atlantic Ocean. While these blooms serve as an important habitat for marine life, they can also cause environmental and economic damage when they wash up on shore. In recent years, Caribbean islands such as St Barths have been facing increasing amounts of sargassum seaweed on their beaches, causing problems for tourism and the local ecosystem.

Introducing the Sargasse Project

The Sargasse Project is a local initiative in St Barths that aims to transform sargassum seaweed into a valuable resource. The project was started by Pierre-Antoine Guibout, a local entrepreneur and owner of the Cygne Noir brand. Guibout noticed the impact of sargassum on St Barths’ beaches and began researching ways to turn it into a useful material.

Project Goals and Progress

The goal of the Sargasse Project is to create a sustainable solution for sargassum seaweed while also promoting economic development in the Caribbean. The project aims to achieve this by developing a manufacturing process that transforms the seaweed into a material that can be used in various applications.

Currently, the project is still in its early stages, with a pilot factory planned for installation in St Barths. This factory will be capable of processing around 6,000 tons of sargassum seaweed, transforming it into plates of 250 kilograms each. The project team plans to work with interested industrial partners to use these plates as a sustainable material for various products.

The Science Behind the Project

To create a sustainable material from sargassum seaweed, the Sargasse Project relies on science and innovation. Through extensive research and testing, the team has developed a process that turns the seaweed into a material with properties similar to paper and cardboard.

The project has also partnered with the Centre d’étude et de valorisation des algues (CEVA), a French laboratory dedicated to studying and developing new uses for seaweed. CEVA has certified the Sargasse Project’s creation, which was shown to have similar properties to traditional paper and cardboard.

Potential Benefits of the Sargasse Project

The Sargasse Project has the potential to benefit St Barths in several ways. By providing a solution for the sargassum seaweed problem, the project can help promote sustainable tourism in the island. Additionally, the project can promote economic development by creating a new industry that uses local resources.

The project’s success can also have wider implications for other Caribbean islands facing similar sargassum seaweed problems. By creating a sustainable material from the seaweed, the project can help address an environmental issue while also promoting economic development in the region.


The Sargasse Project is a promising initiative in St Barths that seeks to address the issue of sargassum seaweed in a sustainable way. By transforming the seaweed into a valuable resource, the project has the potential to promote sustainable tourism and economic development in the Caribbean. While the project is still at its early stages, its potential benefits are significant, and it is definitely something to watch for the future.



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