Hoi Ha Wan (Chinese: 海下灣) or Jone's Cove is a bay at the north of Sai Kung Peninsula. It is part of Hoi Ha Wan Marine Park, a marine park in Hong Kong. The village of Hoi Ha is located on the innermost shore of Hoi Ha Wan.
The location has a high biological value, as it shows significant biodiversity. That is because the Park is a sheltered bay with pristine water quality, so that it provides a good marine environment for housing a great variety of marine organisms. Numerous kinds of corals can be ascertained under the sea, and it is a hot spot for diving.[citation needed] So as to keep the local ecosystems away from human intervention, fishing, particularly bottom trawling and uses of dynamites or poisons like cyanides, collecting sea products and corals are prohibited by law.