the name of three lakes in northern Tiumen’ Oblast, RSFSR.
Two of the lakes are located on the Yamal Peninsula. One of them is the source of the Seiakha River, which empties into Ob’ Bay. The lake’s area is 169 sq km.
The other Lake Iambuto on the Yamal Peninsula is the source of the Mordyiakha River, which empties into Sharapov Shar Gulf. The lake has an area of 119 sq km.
The third lake is located on the Gyda Peninsula. It has an area of 160 sq km. The Iambutoiakha River rises in the lake and empties into Gyda Gulf.
The three lakes are fed primarily by snow. They are frozen over between October and June.