Yan Chau Tong Marine Park, Marine park in North District, Hong Kong.

Yan Chau Tong Marine Park is a coastal zone with mangrove forests, seagrass beds, and other marine habitats that support diverse fish populations. The protected area includes several bays and island groups where different environments sit side by side.

This coastal landscape took shape over millions of years through geological processes that created its mountains and bays. Today it functions as a marine protected area to safeguard these natural systems.

Fishermen in this area continue working with methods passed down through generations, visible in designated zones where traditional practices remain part of daily life. This living connection to the sea reflects Hong Kong's maritime heritage.

The park covers about 680 hectares across two bays: one at Lai Chi Wo, bounded by a line from Chung Wan Tsui to Kau Lo Tau, and a larger one whose sea boundaries link Sai Lau Kong with Shek Ngam Tau and Lo Sha Tin on Wang Wan Chau with Tong Pai Tau. Access is by boat; no public piers or guided tours are mentioned in the sources. The intertidal flats and mangroves at Lai Chi Wo and Sam A are best seen at low tide.

All eight true mangrove species recorded in Hong Kong grow at Lai Chi Wo, where the stand covers about 3 hectares; the smaller stand at Sam A Village holds five species. The two together account for the park's mangrove diversity, not the whole 680-hectare zone.