Idiosepius is a genus of squids in the family Idiosepiidae.

[2] They are small, reaching mantle lengths of no more than about 21 mm (0.8 in);[3] members of this genus represent no interest to commercial fisheries.

[4] They occur in tropical and temperate waters throughout the Indo-Pacific, primarily in association with seagrass and mangrove roots.

[3] The following species are recognised in the genus Idiosepius:[2]

This cephalopod-related article is a stub.