Seagrasses have a high capacity to store and sequester a considerable amount of ‘blue’ carbon in marine sediments. Accumulation of organic carbon in seagrass sediment arises from in situ seagrass production, which could be influenced by seagrass species composition. Moreover, wave exposure can influence the sediment condition and thus carbon preservation and at the same time dictate the seagrass species composition and productivity. We compared the carbon in seagrass communities growing in three different exposures location (low-, medium-, high exposure) in the Spermonde Archipelago, South Sulawesi, Indonesia. Sediment carbon in seagrass bed (up to 15 cm depth) was significantly lower in high exposure locations compared to medium- and low exposure, for all species. This difference was consistent with lower seagrass biomass and lower organic material in the high exposure location that might be due to erosion from the wave action in high exposure site. This research provide important additional information to the growing global datasets on carbon stocks, especially from the centre of high seagrass biodiversity (Indo-Pacific region), and further demonstrates that the level of exposure from the open ocean influences carbon storage in seag