Sepia bartletti is a species of cuttlefish native to the western Pacific Ocean. It is known only from the type locality. Depth range is unknown.S. bartletti is known from only the holotype and six other specimens (all cuttlebones) described by Tom Iredale in 1954. It is possibly a junior synonym of Sepia bandensis. The placement of S. bartletti in the genus Sepia is also questionable.S.