Bohai Bay is one of the three bay

Headlands and bays

Headlands and bays are two related features of the coastal environment.- Geology and geography :Headlands and bays are often found on the same coastline. A bay is surrounded by land on three sides, whereas a headland is surrounded by water on three sides. Headlands are characterized by high,...

s forming the Bohai Gulf, the innermost gulf of the Yellow Sea

Yellow Sea

The Yellow Sea is the name given to the northern part of the East China Sea, which is a marginal sea of the Pacific Ocean. It is located between mainland China and the Korean Peninsula. Its name comes from the sand particles from Gobi Desert sand storms that turn the surface of the water golden...

, in northeast China

Northeast China

Northeast China, historically known in English as Manchuria, is a geographical region of China, consisting of the three provinces of Liaoning, Jilin and Heilongjiang. The region is sometimes called the Three Northeast Provinces...

. It borders Hebei

Hebei

' is a province of the People's Republic of China in the North China region. Its one-character abbreviation is "" , named after Ji Province, a Han Dynasty province that included what is now southern Hebei...

 province and Tianjin Municipality. The three bays are Laizhou Bay

Laizhou Bay

Laizhou Bay is the southern arm of the Bohai Sea , which is a large relatively shallow extension of Korea Bay behind the Liaodong Peninsula to the north, and the Shandong Peninsula to the south...

 to the south, Liaodong Bay

Liaodong Bay

Liaodong Bay is one of the three bays forming the Bohai Gulf, the innermost gulf of the Yellow Sea, in northeast China. It borders Liaoning province.The three bays are Laizhou Bay to the south, Liaodong Bay to the north, and Bohai Bay to the west....

 to the north, and Bohai Bay to the west.

It is the most southerly sea in the northern hemisphere in which sea ice can form.

There are several oil field

Oil field

An oil field is a region with an abundance of oil wells extracting petroleum from below ground. Because the oil reservoirs typically extend over a large area, possibly several hundred kilometres across, full exploitation entails multiple wells scattered across the area...

s located offshore in the Bohai Bay. Jidong Nanpu contains 7500000000 barrels (1,192,404,712,500 l), while the bay as a whole is estimated to contain 146 Goilbbl.

On June 4, 2011 a large oil spill

2011 Bohai bay oil spill

The 2011 Bohai bay oil spill was a series of oil spills that began on June 4, 2011 at Bohai Bay. The spill itself however was not publicly disclosed until a month later...

 occurred related to the China National Offshore Oil Corporation

China National Offshore Oil Corporation

China National Offshore Oil Corporation is one of the three major national oil companies of China....

.