Marine Biodiversity. Origin and evolution of the marine fauna of the Mediterranean. The Zoogeographical sectors of the Mediterranean: the Alboran sea, the balearic basin, the gulf of Lyons, the ligurian Sea, the tyrrhenian sea, the coasts of North Africa, The Sicilian Channel, the Ionian sea, the Adriatic sea and its subdivisions, the gulf of Syrtis, the Levant Sea, the Aegean sea and its subdivisions. The Black Sea. The Caspian sea. The Lusitanian and Mauretanic subprovinces. Description of the species exclusive to each sector.Identification, at the species level whenever possible, of the animal component of selected marine habitats.