French oyster farmer Didier Dubos removes crates of oysters from the water at the Courbey oyster park in Arcachon Bay 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