 Sepia plathyconchalis

Sepia plathyconchalis is a species of cuttlefish native to the western Indian Ocean, specifically the Saya-de-Malha Bank, Cargados-Carajos Shoals, and St Brandon Shoals.It lives in shallow waters at depths of between 25 and 63 m.

"S. plathyconchalis" grows to a mantle length of 8 to 63 mm.