Idiosepiidae

Idiosepiidae are the smallest known squids: males can grow to about and females to about in mantle length. The mantle is elongate, obovate to cigar-shaped, with its posterior margin bluntly pointed at the distal tip. Their internal chitinous shell is vestigial, and the dorsal surface of the mantle has a unique oval adhesive organ, which secretes a sticky substance and is used to attach itself to seaweed or seagrass blades. The head is prominent while the arms are short. In males, both ventral arms are differentiated, but they are also different from each other. ==Distribution and ecology==

Idiosepiidae have an Indo-west Pacific distribution, from South Africa in the west to Japan and Russia in the east. They appear to be short-lived and have multiple generations per year. In temperate climates their population declines at the end of the warm season. They generally live in shallow water among seagrass and mangroves. They often adhere themselves to substrate, enabling camouflage and concealment during the day. They are solitary. Mating is promiscuous with multiple matings. Young individuals are planktonic. They appear to be sit-and-wait predators. They feed mainly on small crustaceans like Latreutes acicularis. ==Genera==

The following genera are recognised in the family Idiosepiidae: • Xipholeptos Reid & Strugnell, 2018 ==References==