CARRIER FOR GROWING MACROALGAE, WITH AN ELEMENT PROVIDED FOR THE GROWTH OF SEEDS DEPOSITED THEREON, AND HAVING ELEMENTS FOR SUSPENSION IN A WATER VOLUME. THE CARRIER (11) IS A SHEET PROVIDED WITH APERTURES (12) ALLOWING THE FLOW OF WATER FROM ONE SIDE TO THE OTHER, THE SURFACE OF THE SHEET HAVING A STRUCTURE WHICH WILL RETAIN SPORES AND SEEDS. THE INVENTION ALSO COMPRISES AN ARRANGEMENT FOR SUSPENDING SUCH A CARRIER (11). IT COMPRISES CONNECTING MEANS (16) CONNECTED TO AT LEAST ONE PART OF AN EDGE (14) OF THE CARRIER. IT MAY ALSO BE USED A PLATFORM SUBMERSED IN THE SEA, TO WHICH THE CARRIER MAY BE ATTACHED. FIGURE 1