Deep Bay is a bay off the northwest coast of Lau Fau Shan, Hong Kong
. It is surrounded to the north by Shenzhen proper and west by the peninsula of Nantau, China
. It is also known as Hau Hoi Wan in Hong Kong, and Shenzhen Bay in China.
As the bay is largely enclosed by lands, fresh water from the surroundings are injected to the bay, formed by a large sheer with a shallow shore of wetlands. 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 marshes. 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, 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 for migrating birds in the area. Pools of former fishing farming is another attraction to birds.
Agriculture and fisheries
The ecology of the bay made the bay rich in fish and oysters. Lau Fau Shan is particularly famous for oysters in Hong Kong. From Lau Fau Shan to Mai Po, the villagers made use of the special environment forms pools to cultivate fishes. A by-product of the cultivation, greasyback shrimp, is also a delicacy in Hong Kong.