The Kolyma Bay is one of the main gulfs of the East Siberian Sea

East Siberian Sea

The East Siberian Sea is a marginal sea in the Arctic Ocean. It is located between the Arctic Cape to the north, the coast of Siberia to the south, the New Siberian Islands to the west and Cape Billings, close to Chukotka, and Wrangel Island to the east...

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The bay gets its name from the Kolyma Lowlands, whose coastline forms the whole eastern half of this bay. The Kolyma Lowlands are dotted with numerous lakes and swamps. The sea in this bay is frozen for over nine months every year and is often clogged with ice floes.

The Kolesovsky Island and Kolesovskaya Otmel

Kolesovskaya Otmel

Kolesovskaya Otmel is an island in the East Siberian Sea. It is located close to the coast in the Kolyma Bay , south of the Konechnaya Channel and 13 km east of the mouths of the Indigirka River. 6.3 km in length and 1.4 km across. In satellite pictures it appears as two separate...

 are located close to the shore in the central part of the Kolyma Bay. Further west, the Indigirka River

Indigirka River

The Indigirka River is a river in the Sakha Republic in Russia between the Yana River and the Kolyma River. It is in length. The area of its basin is 360,000 km²...

 flows into the sea on the western side of the Kolyma Bay, forming a large river delta

River delta

A delta is a landform that is formed at the mouth of a river where that river flows into an ocean, sea, estuary, lake, reservoir, flat arid area, or another river. Deltas are formed from the deposition of the sediment carried by the river as the flow leaves the mouth of the river...

. The Sundrun River

Sundrun River

The Sundrun River is a river in the Sakha Republic of the Russian Federation. It crosses the tundra first in a roughly eastern and then, more than halfway through its course, in a northern direction. It flows into the East Siberian Sea at the western end of the Kolyma Bay...

 has its mouth at the northwestern limit of the bay

The Kolyma Bay should not be confused with the larger Kolyma Gulf

Kolyma Gulf

The Kolyma Gulf is the largest gulf of the East Siberian Sea...

 further east.
Administratively the Kolyma Bay belongs to the Sakha Republic (Yakutia) of the Russian Federation.