Diamond Island is undulating with a coast line of 4.8 km (3.0 mi) consisting of sandy beaches and narrow cliffs running south and west. The highest elevation is approximately 35 m (115 ft). Three rain fed reservoirs provide freshwater. There are about 90 craters from bombs dropped during the Second World War.[5]
Faunal species present in the sanctuary and along the coast mainly include marine species such as olive ridley sea turtle (Lepidochelys olivacea), loggerhead sea turtle (Caretta caretta), green sea turtle (Chelonia mydas), hawksbill sea turtle (Eretmochelys imbricata), and leatherback sea turtle (Dermochelys coriacea). The later two are considered extremely rare. The island beach is mainly calcarious, which is suitable for turtles when laying eggs.[5] As of 1999, about 20,000-30,000 green see turtle eggs and 7,000-15,000 loggerhead sea turtle eggs were estimated on beaches every year.[2]
^Lazarus, K. M.; Cardinale, P.; Corbett, M.; Lin, N. S.; Noeske, T. K. H. (2017). "Baseline Assessment Report of Terrestrial Biodiversity"(PDF). Strategic Environmental Assessment of the Hydropower Sector in Myanmar. Washington, D.C.: International Finance Corporation.{{cite book}}: CS1 maint: multiple names: authors list (link)