The marine area between Rdum Majjiesa and Ras Raheb is beeing proposedas a potential marine conservation area since it suppets a representive selection of all major biotopes occuring around the Maltese Island.
The area is located in in the northwest coast of Malta.
The marine area is characteristic of the biological richness of the Maltese island. In fact, Posidonia oceanica, dominates large area of the seabed. Extensive meadows occur on sand as well as on bedrock. From north to south, meadows are practically continious as they transmute from one ecomophosis to another.
In this area, nine different Posidonia meadow ecomorphoses were recorded. These support a large variety of organisms including some of conseration interest such as the bivalve Pina nobilis as well as others of economic importance such as the cephalopod Octopus vulgaris; a considerablenumber of demersal fish species alsooccur. Although not as wedespread as Posidonia oceanica , the lesser Neptune Grass Cymodocea nodosa, is nonethless very abundant in the study area. This seagrass forms a major association within the biocoenosis of fine sands. Because its morphology, Cymodocea nodosa is such less conspicuous than Posidonia oceanica . excluding bedrockcolonised by Posidonia oceanica, hard substrata are almost completly dominated by photophlic algae. Phaeophytes are by far the most abundant macroscopic algal goup. Cytoseira spinosavar. Tenuior is the commonest and the most conspicuous species.
In hard substrata occuring in deeper waters, sciaphilic assemblage characterise these habitat and Flabellia petiolata, Halimeda tuna and Peyssonnelia sp.are the most abundant and dominant. Other rhodophytes such as Jania sp,a number of calcareous algae (mostly corallines), and low-growing hydroids may at times be very abundant as well, but are not conspicuous as they are overshadowed by the larger and more noticeable species.