Luk Keng marsh and Nam Chung fishponds are located at the inner shore area of Starling Inlet in the Northeast New Territories. They are both wetland habitat but belong to different wetland systems. Nam Chung, traditionally a fishpond area, is actively managed by local villagers. In addition to fishponds and the village woodland, the river bank and river mouth marsh support a growth of mangrove plants.
Luk Keng marsh is an abandoned brackish marsh opposite to Luk Keng village. The marsh stores freshwater discharge from the hill stream and collects sea water from Starling Inlet. The marsh near the seashore supports mangrove and the area further inland is mainly freshwater marsh with short grass. The area has become a pasture for stray cattle.