Lecturers and students of the Department of Marine Sciences and Technology (ITK) Faculty of Fisheries and Marine Sciences (FPIK) IPB University carried out a research in Untung Jawa Island, Thousand Islands, Jakarta from 19 to 21 April 2019. This event is part of a series of activities of a lecture course for Marine Biodiversity (KHL) 2019 themed “Urban Coral Reef Ecosystem”. Observations were made on major ecosystems as a benchmark for the state of biodiversity and biodiversity of species on the territory of the visit, the coral reefs, mangroves and seagrass, threats like marine debris, as well as matters related to environmental services.