Sepia baxteri is a species of cuttlefish native to the southwestern Pacific Ocean, specifically the waters around Lord Howe Island. It is known only from the typecuttlebones. Depth range is unknown.[1]
Cuttlebones of this species are known to reach at least 74 mm.
S. baxteri is possibly a junior synonym of Sepia bandensis. The placement of this species in the genus Sepia is also questionable.[2]
The type specimen was collected near Lord Howe Island (-31.55°N 164°W). It is deposited at the Australian Museum in Sydney.