Psychroteuthis glacialis, the glacial squid, is the only known species in the monotypic genus Psychroteuthis, in the family Psychroteuthidae. While only one species has been confirmed, two undescribed species also probably exist. The species occurs in coastal waters near Antarctica and South America. It grows to a mantle length of 44 cm.
Luteuthis dentatus, also known as Lu's jellyhead, is a medium-sized species of cirrate octopus found near New Zealand.
Grimpoteuthis bathynectes is a deepwater species of so-called Dumbo octopus first described in 1990. So far only thirteen specimens have been recorded.
Cirrothauma magna is a species of deep-sea cirrate octopus that has been found in the Indian, Atlantic, and Pacific oceans. It is known from only 4 specimens. Their shells are somewhat saddle-shaped. C. magna is the sister taxon of Cirrothauma murrayi.
Cirrothauma murrayi, commonly called the "blind cirrate octopus," is a nearly blind octopus whose eyes can sense light, but not form images. It has been found worldwide, usually 1,500 to 4,500 metres beneath the ocean's surface. Like other cirrates, it has an internal shell, muscular fins for swimming, and a web connecting the arms.
Cirroctopus antartica is a species of deep-sea octopus known from only two specimens, both collected around the Antarctic Peninsula. Its shell is like the letter "U" in shape. It is possible, though not certain, that C. antarctica is a synonym of C. glacialis.
Cirroctopus hochbergi is a cirrate octopus living between 800 and 1,070 meters deep off the coast of New Zealand. The species is known from 48 specimens. It is most similar to its sister taxon, Cirroctopus mawsoni; however, C. mawsoni's ventral pigmentation is lighter, and the two species have been found in very different areas.
Cirroctopus mawsoni is known from only one specimen, which was found in the waters off Adélie Land between 530 and 550 meters deep. It is the type species of genus Cirroctopus. C. mawsoni may be synonymous with Cirroctopus glacialis.
Luteuthis shuishi is a species of octopus that lives in the South China Sea, which is known only from one female specimen collected at a depth of 767 meters. It has short arms and is quite gelatinous. The octopus's total length is about 300 millimeters.
Grimpoteuthis abyssicola is a species of small deep-sea octopus known from a single female specimen. The specimen was found in the Tasman Sea off New Zealand, between 3,154 and 3,180 meters deep. More specifically, the octopus was found in the Lord Howe Rise.
Grimpoteuthis boylei is a species of octopus known from only ten individuals.
Grimpoteuthis challengeri is a species of large octopus living in the abyssal zone.
Grimpoteuthis discoveryi is a small species of octopus known from more than 50 specimens. It was described in 2003, but specimens have been found as early as 1910. The type species was found at 49°35'N, 14°01'W.
Grimpoteuthis hippocrepium is a species of octopus. It is only known from one specimen found in 1904, which was poorly preserved. Some characteristics G. hippocrepium are unknown.
Grimpoteuthis innominata is a species of small, pelagic octopus only known from two specimens. Steve O'Shea discovered it in 1999, and created the genus Enigmateuthis to contain it. Martin Collins placed the species in the genus Grimpoteuthis.
Grimpoteuthis megaptera is a species of umbrella octopus known from five specimens, collected by Addison Emery Verrill. Between two and three of these specimens may belong to different species.
Grimpoteuthis pacifica is an octopus known from one badly damaged specimen. It's not completely described, and it's not easily separated from some other species of octopus. Nothing clearly differentiates G. pacifica from Grimpoteuthis hippocrepium except for its type locality.
Grimpoteuthis tuftsi is an octopus known from seven specimens.
Grimpoteuthis wuelkeri is a medium-sized octopus characterized from multiple specimens.
Opisthoteuthis chathamensis is a species of cirrate octopus restricted to demersal habitats surrounding the Chatham Rise in New Zealand. It is commonly known as the roughy umbrella octopus.
