Kepulauan Seribu Marine National Park, Marine national park in Jakarta region, Indonesia

Kepulauan Seribu Marine National Park is a protected marine area in the northern Jakarta archipelago that covers more than 100 small islands with wide coral reefs and shallow lagoons. The main islands, Penjaliran Barat and Penjaliran Timur, sit roughly 45 kilometers from the coast and are surrounded by low mangrove forests and sandy shores.

In 1982 the Minister of Agriculture designated about 108,000 hectares of the Thousand Islands as Pulau Seribu Marine Nature Reserve. Minister of Forestry decree 162/Kpts-II/1995, dated 21 March 1995, changed the reserve's function to Kepulauan Seribu Marine National Park. A 2002 decree fixed the marine protected area at 107,489 hectares, and in 2006 the park was named one of Indonesia's model national parks.

Fishermen on inhabited islands leave in narrow boats early in the morning and return with their catch by late afternoon, while park staff works with them to mark zones for marine protection. Tourists often see schoolchildren gathering plastic waste along the shoreline in groups and planting seedlings in the restored mangrove patches.

Visitors reach the islands on regular ferry connections from several Jakarta ports including Marina, Kaliadem, and Muara Angke, with trips taking between one and three hours depending on the destination. Snorkeling gear is available on most islands, but bring your own sunscreen and drinking water as shops carry limited supplies.

In the shallow waters near Penjaliran Timur, large giant clams over 100 years old live and their bright blue shells can be spotted by divers from just a few meters down. Park rangers sometimes take visitors to hidden sandbanks that emerge only at low tide and are used by hundreds of young turtles as resting spots.