Sepia bidhaia is a species of cuttlefish native to the southwestern Pacific Ocean, specifically the waters off the Great Barrier Reef (17°20′S 146°41.5′E / 17.333°S 146.6917°Eto 22°07′S 153°19′E / 22.117°S 153.317°E). It lives at a depth of between 200 and 304 m. Females of this species are slightly larger than males. They grow to a mantle length of 57 mm and 37 mm, respectively. The type specimen was collected near Queensland, Australia (17°55.8′S 146°58.2′E / 17.9300°S 146.9700°E). It is deposited at the Museum of Victoria in Melbourne.