1. A carrier for growing macroalgae with an element intended for growing seeds deposited on it, and having elements for hanging in a volume of water, characterized in that the carrier (11) is a plate provided with perforations (12) that allow water to pass from one side to the other, and the surface of the plate has a structure that holds spores and seeds. 2. The carrier (11) according to claim 1, characterized in that the perforations are essentially parallel to the slots (12). The carrier according to claim 1, characterized in that the perforations are a series of essentially circular holes. A carrier according to one of claims 1 to 3, characterized in that the carrier is rectangular, sheet-shaped or oblong, with an edge (14, 15) at least on the side for hanging. A carrier according to claim 4, characterized in that the edge (14, 15) has a built-in cord (16, 17) for hardening and suspension. The carrier according to claim 1, characterized in that it contains a multilayer structure with a relatively strong and thin foil material and a layer of growth substance that decomposes by microorganisms. The carrier according to claim 1, characterized in that the plate includes a network of reinforced cords. The carrier according to claim 1, characterized in that it contains fertilizer and / or nutrient to enhance the growth of macroalgae. The carrier according to one of claims 1 to 3 or 5-8, characterized in that the buoyancy varies along a segment of the elongated carrier to achieve a wave-like shape when it is suspended in water. The carrier according to claim 4, characterized in that the buoyancy varies along a segment of the elongated carrier to achieve a wave-like shape when it is suspended in water. Device1. Носитель для выращивания макроводорослей с элементом, предназначенным для выращивания семян, осажденных на нем, и имеющий элементы для подвешивания в объеме воды, отличающийся тем, что носитель (11) является пластинкой, снабженной перфорациями (12), обеспечивающим
