The Northern Pygmy Squid (Idiosepius paradoxus) is a species of bobtail squid native to the western Pacific Ocean, including the waters off South Korea, northern Australia, as well as the Japanese islands of Honshū, Kyūshū, and southern Hokkaidō. It inhabits shallow, inshore waters.
I. paradoxus grows to 16 mm in mantle length.
The type specimen was collected off Kadsiyama in Tokyo Bay. It is deposited at the Musee Zoologique in Strasbourg.
- Kasugai, T. 2001. J. Mar. Biol. Ass. U.K. 81: 979-981.
- Kasugai, T. & Y. Ikeda 2003. Veliger (Calif. Malacozoological Soc. Inc., Santa Barbara) 46(2): 105-110.
- Natsukari, Y. 1970. Egg-laying behavior, embryonic development and hatched larva of the pygmy cuttlefish Idiosepius pygmaeus paradoxus Ortmann. Bulletin of the Faculty of Fisheries, Nagasaki University 30: 15-29.
- Shigeno, S. & M. Yamamoto 2002. Journal of Morphology 254: 65-80.
- Yamamoto, M. 1988. Normal embryonic stages of the pygmy cuttlefish, Idiosepius pygmaeus paradoxus Ortmann. Zoological Science 5(5): 989-998.
- Yamamoto, M., Y. Shimazaki & S. Shigeno 2003. Zoological Science (Zoological Society of Japan) 20: 163-179.