Istanbul in the 1970s, as people from Anatolia migrated to the city to find employment in the many new factories that were built on the outskirts of the sprawling metropolis. This sudden, sharp rise in the city's population caused a large demand for housing, and many previously outlying villages and forests became engulfed into the metropolitan area of Istanbul. Istanbul is located in north-western Turkey within the Marmara Region on a total area of . The Bosphorus, which connects the Sea of Marmara to the Black Sea, divides the city into a European, Thracian side—comprising the historic and economic centers—and an
Marine life of the Strait of Messina the Strait of Messina is the presence of a varied and numerous bathypelagic fauna that, transported to the surface by the upwelling current from the South can be easily captured still alive in the points of greater turbulence, or found stranded along the coasts after adverse weather conditions. Examples are "Chauliodus sloani", "Argyropelecus hemigymnus" and "Myctophum punctatum". The Strait of Messina is an important migratory route of the Mediterranean Sea. The best known and important, from an economic point of view, are the great pelagic fish - that is the Tuna ("Thunnus thynnus"), the Albacore ("Thunnus alalunga"), the Atlantic bonito