
Deep Bay is a
bay
A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a ''gulf'', ''sea'', ''sound'', or ''bight''. A ''cove'' is a small, ci ...
between
Yuen Long District
Yuen Long District (Hong Kong Government Cantonese Romanisation, formerly Un Long) is one of the districts of Hong Kong, districts of Hong Kong. Located in the northwest of the New Territories, it had a population of 662,000 in 2021.
Geogra ...
, in the
New Territories
The New Territories (N.T., Traditional Chinese characters, Chinese: ) is one of the three areas of Hong Kong, alongside Hong Kong Island and Kowloon. It makes up 86.2% of Hong Kong's territory, and contains around half of the population of H ...
, Hong Kong, and the city of
Shenzhen
Shenzhen is a prefecture-level city in the province of Guangdong, China. A Special economic zones of China, special economic zone, it is located on the east bank of the Pearl River (China), Pearl River estuary on the central coast of Guangdong ...
in
Guangdong
) means "wide" or "vast", and has been associated with the region since the creation of Guang Prefecture in AD 226. The name "''Guang''" ultimately came from Guangxin ( zh, labels=no, first=t, t= , s=广信), an outpost established in Han dynasty ...
Province. It is otherwise known as Hau Hoi Wan () in Hong Kong, and Shenzhen Bay () in mainland China.
Name
The local Cantonese name of the bay is Hau Hoi Wan (), which means the ''back (sea) bay''. It is opposite to another bay, (), which means ''front (sea) bay'', on the other side of . The Chinese character 后 (Hau, lit. queen) in 后海灣 is the homonym of 後 (Hau, lit. back), and also its
simplified character
Simplified Chinese characters are one of two standardized character sets widely used to write the Chinese language
Chinese ( or ) is a group of languages spoken natively by the ethnic Han Chinese majority and List of ethnic groups in Ch ...
. Some attribute the character 后 (Hau) to the goddess of mercy and sea,
Tin Hau ().
The name of Shenzhen Bay came much later, at least after the establishment of
Shenzhen Special Economic Zone
The Shenzhen Special Economic Zone () is a special economic zone (SEZ) of China. One of four special economic zones (SEZ) established in May 1980, it was the first SEZ created by Deng Xiaoping, and, like the other three zones, was modeled afte ...
in 1980. The name became more notable after a hotel was named 'Shenzhen Bay'. While the government of China uses the name widely, the people and government in Hong Kong continue to use the official name ().
Ecology
As the bay is largely enclosed by land,
fresh water
Fresh water or freshwater is any naturally occurring liquid or frozen water containing low concentrations of dissolved salt (chemistry), salts and other total dissolved solids. The term excludes seawater and brackish water, but it does include ...
from the surrounding land enters the bay from a shallow shore of
wetland
A wetland is a distinct semi-aquatic ecosystem whose groundcovers are flooded or saturated in water, either permanently, for years or decades, or only seasonally. Flooding results in oxygen-poor ( anoxic) processes taking place, especially ...
. The margin of fresh water and
salt water forms a valuable habitat for a wide variety of life.
The bay's northern shore used to be lined with
marsh
In ecology, a marsh is a wetland that is dominated by herbaceous plants rather than by woody plants.Keddy, P.A. 2010. Wetland Ecology: Principles and Conservation (2nd edition). Cambridge University Press, Cambridge, UK. 497 p More in genera ...
es. As Shenzhen began to develop into a major urban centre, the northern shoreline was
reclaimed to provide land for buildings. Some departments had tried to preserve the endangered environment but mistakenly introduced foreign species of
mangrove
A mangrove is a shrub or tree that grows mainly in coastal saline water, saline or brackish water. Mangroves grow in an equatorial climate, typically along coastlines and tidal rivers. They have particular adaptations to take in extra oxygen a ...
, which threatened their indigenous counterparts.
The marshes remain largely intact along the southern part of the bay, which is under Hong Kong's jurisdiction.
Mai Po is an important
habitat
In ecology, habitat refers to the array of resources, biotic factors that are present in an area, such as to support the survival and reproduction of a particular species. A species' habitat can be seen as the physical manifestation of its ...
for
migrating birds
Migration, migratory, or migrate may refer to: Human migration
* Human migration, physical movement by humans from one region to another
** International migration, when peoples cross state boundaries and stay in the host state for some minimum le ...
in the area and is the site where the
Mai Po bent-wing firefly (''Pteroptyx maipo)'' was discovered. Pools of former fish farms is another attraction to birds. Like many coastal areas, it is at risk of sea level rise due to
climate change
Present-day climate change includes both global warming—the ongoing increase in Global surface temperature, global average temperature—and its wider effects on Earth's climate system. Climate variability and change, Climate change in ...
, which would damage the roots of the mangroves.
Agriculture and fisheries

The bay is rich in
fish
A fish (: fish or fishes) is an aquatic animal, aquatic, Anamniotes, anamniotic, gill-bearing vertebrate animal with swimming fish fin, fins and craniate, a hard skull, but lacking limb (anatomy), limbs with digit (anatomy), digits. Fish can ...
and
oyster
Oyster is the common name for a number of different families of salt-water bivalve molluscs that live in marine or brackish habitats. In some species, the valves are highly calcified, and many are somewhat irregular in shape. Many, but no ...
s.
Lau Fau Shan
Lau Fau Shan () is an area of Yuen Long District, in the New Territories of Hong Kong. It is at the shore of Deep Bay, near Tin Shui Wai and facing Shekou in Shenzhen, China.
Economy
Lau Fau Shan is traditionally famous for fresh oysters. Abo ...
is particularly famous for oysters in Hong Kong. From Lau Fau Shan to Mai Po, the villagers made use of the special environment's pools to cultivate fishes. A by-product of this cultivation,
greasyback shrimp
''Metapenaeus ensis'' (sometimes called the greasyback shrimp or sand shrimp) is a species of prawn.
Distribution
''Metapenaeus ensis'' is found in the waters of the Indo-West Pacific Region. The shrimp is found in brackish waters with depths be ...
(), is also a delicacy in Hong Kong.
Illegal immigrants
Before 1949, Chinese people were free to travel between
Hong Kong
Hong Kong)., Legally Hong Kong, China in international treaties and organizations. is a special administrative region of China. With 7.5 million residents in a territory, Hong Kong is the fourth most densely populated region in the wor ...
and
mainland China
"Mainland China", also referred to as "the Chinese mainland", is a Geopolitics, geopolitical term defined as the territory under direct administration of the People's Republic of China (PRC) in the aftermath of the Chinese Civil War. In addit ...
. In order to halt a large influx of refugees from mainland China, the
Hong Kong Government
The Government of the Hong Kong Special Administrative Region (commonly known as the Hong Kong Government or HKSAR Government) is the Executive (government), executive authorities of Hong Kong. It was established on 1 July 1997, following the ...
established border control and compulsory registration of Hong Kong residents.
As a result, it was harder to migrate to Hong Kong than before and thus many crossed the border illegally. Deep Bay became the main access for illegal immigrants because border controls were harder to enforce at sea. It was relatively easy to cross the bay and there were major roads to the urban centres of Hong Kong. The rural town of Lau Fau Shan was the major landing point.
Conservation
* A part of "Inner Deep Bay", covering 1,036 hectares, was designated as a
Site of Special Scientific Interest
A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...
of Hong Kong in 1986.
See also
*
List of bays in Hong Kong
The following is a list of bays in Hong Kong:
Hong Kong Island
Clockwise order from northwest:
* Belcher Bay
*Wan Chai
*Causeway Bay
*Quarry Bay
* Aldrich Bay
*Shau Kei Wan
* Lyee Mun Bay
* Chai Wan
*Siu Sai Wan
* Ngan Wan
* Big Wave Bay
* She ...
*
Agriculture and aquaculture in Hong Kong
*
Qianhai, the commercial district of Shenzhen named after 'front bay'
*
Hong Kong–Shenzhen Western Corridor, the bridge crossing the Deep Bay from Shenzhen to Hong Kong
References
Further reading
*
External links
Google Maps of Deep Bay
{{coord, 22.4992, 113.9701, type:landmark_source:enwiki-googlemaplink, display=title
Bays of Hong Kong
Bays of Guangdong
Yuen Long District
Lau Fau Shan
Mai Po
Nanshan District, Shenzhen