Enhancing the nursery function of the Atlas platform of La Ciotat Shipyards by adding eco-designed devices creating artificial habitats inspired by nature.Design, manufacture and immersion of artificial micro-habitats (Roselières© and Oursins©), Definition of the scientific monitoring (provided by Biotope) of the installed modules. Volume of submerged habitats (external envelope) on a large scale: 500 m3.