French oyster farmer Didier Dubos sorts newly harvested oysters from the Courbey oyster park in Gujan-Mestras on December 6, 2017. French oyster farmer Didier Dubos only harvests diploid oysters, with two sets of chromosomes, and is worried about the lack of information regarding the harvest of triploids, which have been modified in laboratories and have three sets of chromosomes. / AFP PHOTO / MEHDI FEDOUACH