Subregions- Arunachal Pradesh-Assam region, India
 - Cambodia
 - Cambodia-Vietnam border region
 - China-Laos border region
 - Gulf of Tongking
 - Hainan, China
 - Kepulauan Anambas region, Indonesia
 - Kepulauan Natuna Selatan region, Indonesia
 - Kepulauan Tambelan region, Indonesia
 - Laos
 - Laos-Cambodia border region
 - Laos-Vietnam border region
 - Laos-Vietnam-Cambodia border region
 - Manipur, India region
 - Myanmar
 - Myanmar-Bangladesh border region
 - Myanmar-China border region
 - Myanmar-India border region
 - Myanmar-Thailand border region
 - Natuna Besar region, Indonesia
 - near the south coast of Myanmar
 - South China Sea
 - Thailand
 - Thailand-Cambodia border region
 - Thailand-Laos border region
 - Thailand-Laos-Cambodia border region
 - Vietnam
 - Xizang-Yunnan border region

| |