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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