Tropical and subtropical marine ecosystems (TASMEC) are hotspots of biodiversity and provide a variety of ecosystem services, including food supply, water purification, tourism and cultural services. Coastal regions of TASMEC are the most populated area in the world and are experiencing rapid growth in population and economic activity. The marine ecosystem services in TASMEC are deteriorating because to anthropogenic perturbations including global warming and increased human activity. These include coral bleaching, eutrophication, chemical pollution, the collapse of fishery resources, etc. For developing countermeasures against the degradation and sustainable use of marine ecosystem services, it is necessary to take science-based decision-making process by all the stakeholders of the marine ecosystems. Despite the importance, the structure and dynamics of TASMEC and the biogeochemical cycles are not fully understood due to the limitation of ocean professionals and scientific facilities. Expert training, education and transfer of marine technology are essential activities to increase scientific knowledge at TASMEC and to realize the sustainable use of marine ecosystem services for human wellbeing. This session will discuss regional and international collaboration activities for solving scientific challenges, education and technology transfer in TASMEC.