Researchers from the Riomar project prepare the sampling tools on board the Antedon II boat in the Rhone River delta in the Gulf of Lion near Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

A researcher sorts samples of water collected in the laboratory on the Antedon II ship during a sea trip by the Riomar project research team in the Rhone River delta in the Gulf of Lion near Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

A researcher works with water samples collected for analysis at the Mediterranean Institute of Oceanology in Marseille as part of the Riomar project in Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

Researchers working in the Riomar project collect sediment samples on board of the Antedon II boat in the Rhone River delta in the Gulf of Lion near Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

View of a fishing boat from the Antedon II ship during a sea trip by the Riomar project research team in the Rhone River delta in the Gulf of Lion near Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

A sailor accompanied by a researcher working in the Riomar project prepare to deploy a "Niskin" bottle in the water from a boat to take a sample in the Rhone River delta in the Gulf of Lion near Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

A researcher works with a water sample collected for analysis at the Mediterranean Institute of Oceanology in Marseille as part of the Riomar project in Marseille on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)

View of the Fos-sur-Mer factories from the Antedon II boat during a sea trip by the Riomar project research team in the Rhone River delta in the Gulf of Lion on September 25, 2024. The Riomar project studies the evolution of the coastal environment under the influence of rivers in five metropolitan coastal areas to observe and model the coastal environment at the mouths of French rivers. (Photo by DAVID COSTA / AFP) (Photo by DAVID COSTA/AFP via Getty Images)