Coastal erosion has dramatically reshaped the Langue de Barbarie, a sandy peninsula near Saint-Louis, Senegal, which separates the ocean from the final stretch of the Senegal River. In Guet Ndar, a fishing neighborhood within Saint-Louis, hundreds of meters of coastline have vanished in recent years. The creation of the Saint-Louis breach in 2003, an artificial opening in the peninsula meant to prevent flooding, has worsened erosion and submersion. As a result, homes have been destroyed, families have been displaced, and some residents have moved to distant locations far from their traditional environment. Despite this, many displaced individuals continue to maintain a strong connection with Guet Ndar, often returning to the area. Fishing in Guet Ndar initially centered on the river but gradually shifted to the sea, especially from the 19th century. This transition made the Guet-Ndariens skilled seafarers and migrant fishermen who traveled along coastlines in search of resources. Today, fishing canoes must travel farther to find fish, with some fishermen venturing into the open sea or even to neighboring countries like Mauritania and Gambia. A university study highlights this mobility as a defining feature of the community, shaped by declining marine resources and the search for new fishing grounds. However, this increased movement has brought new risks, including maritime accidents, harsh weather, conflicts with large industrial ships, and a growing disinterest among young people in pursuing fishing as a profession. The breach, known locally as "Beulbeu," has had severe consequences, including the submersion of about eight hectares of land, displacement of people, changes in fishing practices, and heightened vulnerability. More than 500 fishermen have been affected by this breach. The area has also been impacted by the beginning of gas exploration off the coast of Saint-Louis, particularly the Grand Tortue Ahmeyim (GTA) gas project, which has reduced accessible fishing areas by around 3.24 km², with 1.6 km² located in Senegal. Seismic surveys, which began in 2014 without consulting local communities, have disrupted traditional fishing routes and reduced available fishing grounds, disproportionately affecting women who process fish, who are often the first to suffer from these changes. Fama Sarr, deputy secretary general of the local council of artisanal fishing (CLPA) in Saint-Louis, calls for meaningful community involvement in decisions related to their maritime space. Sociologist Abdoulaye Sène emphasizes the need to define who fishes, where, and within what boundaries, as artisanal fishing now shares the waters with trawlers, industrial ships, hydrocarbon installations, and environmental challenges. The Langue de Barbarie itself has become a fragile area, with Saint-Louis among the regions most at risk from coastal erosion and rising sea levels. Mamadou Sarr, a young fisherman, says that the sea represents the land for his community. He and others hope that revenue from hydrocarbon extraction can help affected communities adapt, transition to new livelihoods, and modernize artisanal fishing. Pape Samba Sow, an artist and writer in Saint-Louis, points out that water remains the only resource for Guet Ndar’s inhabitants and highlights the exhaustion of sending children abroad in search of better opportunities.