The Blue Carbon Initiative is an international group funded by various conservation agencies, dedicated to a better understanding of the roles of seagrass, mangroves and salt marshes as carbon sinks. The studies are ongoing and there is a close association between the scientists and policy makers. We adopted the idea of “blue carbon” and attempt to estimate the carbon content in the seagrass beds in Ranong Biosphere Reserve and Trang Haad Chao Mai Natianal Park in Southern Thailand. We hope that our studies promote further research and prove the importance of their conservation in Thailand and surrounding regions.