The Laptewsee is a marginal sea of the Arctic Ocean lying north of Russia and Asia. The Laptev Sea extends from about 72 ° latitude northward to the permanent ice limit of the north polar sea at about 80°, or from 110° to 140° longitude and occupies an area of about 714,000 km2 at an average depth of 578 meters. The largest recorded depth to date is 2980 metres below sea level.
Adjacent marginal seas, the Laptev sea are in the West, the Kara sea and in the East, the East Siberian sea, which is located to the East of the new Siberian Islands. Under the Laptev sea permafrost areas are from the time of previous exposure to cold air.
There are only a few settlements on Lake Laptev, including the port town of Tiksi. It is named after the Russian researcher Khariton Prokofievich Laptev and his Cousin Dmitri Yakovlevich Laptev.