In the only floristic study that has been done in the Port of Ensenada 37 macroalgae species were registered, those of which, clearly marked for their abundance are Ulva intestinalis, U. califonica, U. nematoidea and Sargassum muticum [10], since then and to date the number of introduced species has increased to 4, and above all,ecological damage has been made evident by the abundance of these new species in the intertidal zone of Port Ensenada, which drastically reduced the number of native species.