The invention relates to a floating structure. The floating structure comprises a floating unit provided with ballast, and a draught adapting module arranged at a top part of the floating unit and including an upwardly extending wall surrounding a chamber. The upwardly extending wall is provided, at different height levels, with openings enabling a fluid exchange between the chamber and the exterior of the floating structure. The invention further relates to a method for adapting a draught level of a floating structure, a method of culturing marine organisms, and a use of a floating structure.