Sepia hieronis is a species of cuttlefish of the Sepiidae family native to the southeastern Atlantic Ocean and southwestern Indian Ocean, specifically southern Namibia, from approximately 27S to Port Alfred, South Africa, and east Africa from 17S to Kenya and Mozambique that grows to a mantle length of 70 mm and can be found in the Great Chagos Bank.
Sepia hieronis is a species of cuttlefish native to the southeastern Atlantic Ocean and southwestern Indian Ocean, specifically southern Namibia, from approximately 27S to Port Alfred, South Africa, and east Africa from 17S to Kenya and Mozambique. It is also present in the Saya-de-Malha Bank. The Great Chagos Bank, in the Chagos Archipelago, about 500 km (310 mi) south of the Maldives, is the largest atoll structure in the world, with a total area of 12,642 km (4,881 sq mi). 
