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 27°S to Port Alfred, South Africa, and east Africa from 17°S 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 of the Sepiidae family native to the southeastern Atlantic Ocean and southwestern Indian Ocean, specifically southern Namibia, from approximately 27°S to Port Alfred, South Africa, and east Africa from 17°S to Kenya and Mozambique that grows to a mantle length of 70 mm and can be found in the Great Chagos Bank.