Sepia reesi is a species of cuttlefish native to the southeastern Indian Ocean.

Cuttlebone of this species known only from the type locality.

[3] Sepia reesi grows to a mantle length of 45 mm.

[3] Sepia reesi was only known from the type specimen was collected in Salmon Bay, Rottnest Island, Western Australia but a complete specimen was collected west of Rottnest Island (32º00’S 115º15’E) at a depth of 146-150m.

[4] The specific epithet reesi honours British researcher William James Rees.