Sepia thurstoni is a species of cuttlefish native to the Indian Ocean, specifically the waters off Chennai in India and off Negombo and Hambantota in Sri Lanka.
Sepia thurstoni is a species of cuttlefish found in the Indian Ocean, specifically in the waters surrounding the regions of southern India, such as Chennai, and off the coasts of Sri Lanka's cities of Negombo and Hambantota.