Northern pygmy squid
Idiosepius paradoxus, also known as the northern pygmy squid, 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 Honshu, Kyushu, and southern Hokkaidō. It inhabits shallow, inshore waters.
I. paradoxus grows to 16 mm (0.63 in) in mantle length.
The type specimen was collected off Kadsiyama in Tokyo Bay. It is deposited at the Musee Zoologique in Strasbourg.
The squid is found in the demersal zone in subtropical climates. It resides in algae, seagrass, and seaweed.