When it comes to the highest quality oysters, the first that comes to mind is Gillardeau, named after the family that supplied these oysters to the Élysée Palace. The uniqueness of Gilardos is that they can retain their properties for a long time and are considered a delicacy due to their limited production. By the way, these oysters are cultivated for up to 4 years in the provinces of Brittany and Normandy.