Idiosepius is a genus of squids in the family Idiosepiidae. Most well known for their incredibly tiny size, these squids range from 10 to 18 mm (0.39 to 0.75 in) in adult specimens. Members of this genus are of no interest to commercial fisheries. Idiosepius are found primarily in tropical and temperate waters throughout the Indo-Pacific, often found in association with seagrass and mangrove roots.

...