Surat Thani province is located at Lat 9 degrees 7′N and Long 99 degrees 21′E. The mean annual rain fall is 1,710 mm. District of Kanchanadit,Koh Samui, Chaiya, Donsak, Tha Chang, Phunphin as well as Mueang Surat Thani were covered by 74.51872 km2of mangroves. Family Rhizophoraceae and Acanthaceae are dominant trees.