Mediterranean Sea more like the Red Sea and worsening the impact of the invasive species. Invasive species have become a major component of the Mediterranean ecosystem and have serious impacts on the Mediterranean ecology, endangering many local and endemic Mediterranean species. A first look at some groups of exotic species show that more than 70% of the non-indigenous decapods and about 63% of the exotic fishes occurring in the Mediterranean are of Indo Pacific origin, introduced into the Mediterranean through the Suez Canal. This makes the Canal as the first pathway of arrival of "alien" species into the Mediterranean. The impacts of
Mediterranean Sea sea in two main subregions: the Western Mediterranean, with an area of about 850 thousand km (330 thousand mi); and the Eastern Mediterranean, of about 1.65 million km (640 thousand mi). A characteristic of the coastal Mediterranean are submarine karst springs or s, which discharge pressurised groundwater into the coastal seawater from below the surface; the discharge water is usually fresh, and sometimes may be thermal. The Mediterranean basin and sea system was established by the ancient African-Arabian continent colliding with the Eurasian continent. As Africa-Arabia drifted northward, it closed over the ancient Tethys Ocean which had earlier separated the