Subregions- Andaman Islands, India region
 - Gulf of Thailand
 - Malay Peninsula, Malaysia
 - Malay Peninsula, Myanmar
 - Malay Peninsula, Thailand
 - Nias region, Indonesia
 - Nicobar Islands, India region
 - northern Sumatra, Indonesia
 - off the coast of the Malay Peninsula, Myanmar
 - off the west coast of northern Sumatra
 - Simeulue, Indonesia
 - Singapore region
 - Strait of Malacca
 - Thailand-Malaysia border region
 - west of the Malay Peninsula, Thailand

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