Bathyteuthis is the singular genus of squid in the family Bathyteuthidae, encompassing three species.
Batoteuthis skolops, the bush-club squid, is the single rare species in genus Batoteuthis, which is the only genus in family Batoteuthidae. The squid is found in Antarctic waters, and reaches a mantle length of at least 350 mm (14 in). Some features of this creature are a small head, a long tail and a very peculiar tentacle, with six series of suckers on the club.
Brachioteuthis is a genus of squid comprising six species.
Chtenopteryx is a genus of small, muscular, midwater squid in the monotypic family Chtenopterygidae. Four species are presently recognized in the genus, but more are believed to exist.
The Gonatidae, also known as armhook squid, are a family of moderately sized squid. The family contains about 19 species in three genera, widely distributed and plentiful in cold boreal waters of the Pacific Ocean. At least one species is known from Antarctic waters, and two from the North Atlantic. The genus Eogonatus was created for the species known as Eogonatus tinro because it did not have hooks on the tentacular club and it has 5 rows of teeth on the radula. Molecular studies in allozymes and mitochondrial DNA have indicated that this species nests within the genus Gonatus, although other authorities treat it as a synonym of Gonatopsis okutanii.
Histioteuthis is a genus of squid in the family Histioteuthidae. It goes by the common name cock-eyed squid, because in all species the right eye is normal-sized, round, blue and sunken; whereas the left eye is at least twice the diameter of the right eye, tubular, yellow-green, faces upward, and bulges out of the head.
Helicocranchia is a genus of small glass squids from the family Cranchiidae, known as piglet squid. They are characterized by possessing a very large funnel and in having a pair of small paddle-like fins which are attached to a part of the gladius which sits above the muscular mantle. These squid undergo a slow descent starting near the surface as paralarvae moving down to lower mesopelagic depths as near-adults.
Galiteuthis is a genus of glass squids from the family Cranchiidae and the subfamily Taoniinae. Squids in the genus Galiteuthis are large squids with mantle lengths measuring up to 660 mm (26 in), although it has been suggested that mantle length could reach as much as 2.7 m. The most distinctive feature of the speciesa in this genus are they have hooks on the tentacular clubs while there are no hooks on the arms, and by their long, thin, terminal fins.
Taonius is a small genus of glass squid. Although it comprises only three recognised species, it has been suggested there may be as many as five species. Taonius borealis is found in the North Pacific Ocean and Taonius pavo is found in the Atlantic and possibly the south-western Indian Ocean.
Teuthowenia is a genus of glass squid in the subfamily Taoniinae. Members of this genus are characterized by their deep-sea habitat, clear bodies, and ability to engorge themselves with water to become larger when threatened. Each known species has a visible digestive gland, which serves a similar purpose as a stomach and liver.
Mastigoteuthis is a genus of whip-lash squid containing at least seven valid species. Some teuthologists consider Idioteuthis synonymous with this taxon.
Echinoteuthis is a genus of whip-lash squid containing approximately three to five species. Some teuthologists consider Idioteuthis synonymous with this taxon.
Gonatus fabricii, the Boreo-atlantic Armhook Squid, is a squid in the family Gonatidae. It occurs in the northern Atlantic Ocean from Canada to the Barents Sea.
Gonatus onyx is in the class Cephalopoda, in the phylum Mollusca. It is also known as the clawed arm hook squid or the black-eyed squid. It got these names from the characteristic black eye and from its two arms with clawed hooks on the end that extend a bit further than the other arms. It is a squid in the family Gonatidae, found most commonly in the northern Pacific Ocean from Japan to California. They are one of the most abundant cephalopods off the coast of California, mostly found at deeper depths, rising during the day most likely to feed.
Cycloteuthis is a genus of squid in the family Cycloteuthidae. It is distinguished from the genus Discoteuthis by the presence of a tail on the mantle. The species C. akimushkini is currently considered a junior synonym of C. sirventi, however this is inconclusive and the World Register of Marine Species has C. akimushkini as a valid species.
Discoteuthis is a genus of squid in the family Cycloteuthidae. It is distinguished from the genus Cycloteuthis by the absence of a tail on the mantle. The genus occurs in tropical and subtropical oceans worldwide.
Gonatus antarcticus is a squid in the family Gonatidae. The species is known with certainty only from southern Atlantic waters but it may have a circum-Antarctic distribution.
Ornithoteuthis is a small genus of squid, with two species, from the family Ommastrephidae, the "flying squids", the two species in this genus are known as "bird squids". They are relatively small squid, with mantle lengths of around 100–200 mm (3.9–7.9 in), highly agile and rather uncommon. Their characteristics that distinguish then from other members of the subfamily Ommastrephinae are that their mantle and fins are drawn out into a narrow tail and that they have a luminous stripe along their midline on the viscera.
Gonatus pyros, the fiery gonate squid, or fiery armhook squid, is a species of squid within the family Gonatidae. The distribution of the species is in the central and eastern North Pacific from the Aleutian Islands to Baja California, where it lives at depths of 563–667 m (1,847–2,188 ft) in oceanic environments. Their planktonic paralarvae are usually found at depths of 200–300 m (660–980 ft). High abundances occur over continental slopes in the summer. It grows to lengths of 125 mm (4.9 in).
