Octopuses

species of mollusc

Grimpoteuthis

species of mollusc

Cirrina or Cirrata is a suborder and one of the two main divisions of octopuses. Cirrate octopuses have a small, internal shell and two fins on their head, while their sister suborder Incirrina has neither. The fins of cirrate octopods are associated with a unique cartilage-like shell in a shell sac. In cross-section, the fins have distinct proximal and distal regions, both of which are covered by a thin surface sheath of muscle.

species of mollusc

species of mollusc

Incirrata (or Incirrina) is a suborder of the order Octopoda. The suborder contains the classic "benthic octopuses," as well as many pelagic octopus families, including the paper nautiluses. The incirrate octopuses are distinguished from the cirrate octopuses by the absence in the former of the "cirri" filaments (found with the suckers) for which the cirrates are named, as well as by the lack of paired swimming fins on the head, and lack of a small internal shell (the "shell" of Argonauta species is not a true shell, but a thin calcite egg case). This is except for the Sepioidea.

family of molluscs

genus of molluscs

species of mollusc

Cirroteuthidae is a family of pelagic cirrate octopuses comprising at least five species in three genera.

species of mollusc

species of mollusc

Keuppia is an extinct genus of octopus.

species of mollusc

Stauroteuthis is a genus of deepwater cirrate octopus, a cephalopod mollusk. This is the only genus in the family Stauroteuthidae, and only three species have been described in this genus.

Bathypolypus is a genus of octopuses in the monotypic family Bathypolypodidae.

species of mollusc

species of mollusc

Amphitretus is a genus of pelagic gelatinous octopuses. It is the sole genus of subfamily Amphitretinae, one of three subfamilies in the family Amphitretidae and consists of two species. Some authorities consider Amphitretus thielei as a subspecies of Amphitretus pelagicus, which would make the genus monotypic.

species of mollusc

Cirroctopus is a genus of four species of octopuses within the monotypic family Cirroctopodidae. Members of this genus have larger fins than other cirrate octopuses, and tend to be more muscular. They are found in the southern hemisphere, where they live at depths of over 300m.

Vitreledonella is a genus of mesopelagic octopods from the family Amphitretidae which contains two species, one of which is the glass octopus.

species of mollusc

species of mollusc

settlements of gloomy octopuses in Jervis Bay, Australia

species of mollusc

species of cirrate octopus

species of mollusc

medium-sized octopus, and the type species for the genus Enteroctopus

Tusoteuthis is an extinct genus of large enchoteuthine cephalopod that lived during the Cretaceous. Although often called a squid, it is now thought to be more closely related to modern octopuses. Although many specimens from the Western Interior Seaway of North America were described, at 2019, only one, poorly preserved specimen from Kansas is recognized as Tusoteuthis. One species, T. longa, is traditionally recognized. In 2019, due to the poor preservation of the holotype specimen, Tusoteuthis was considered likely to be a nomen dubium, and it was proposed that later described species are b

species of mollusc

species of mollusc

thumbnail|right|A member of the family Amphitretidae. thumbnail|right|A member of the family Bolitaenidae. thumbnail|right|A member of the family Octopodidae. thumbnail|right|A member of the family Vitreledonellidae.

Argonautoidea is a superfamily of the suborder Incirrata containing all known argonautoids.

Amphitretidae is a family of mesopelagic octopods which contains three subfamilies, formerly classified as families in their own right. It is classified in the superfamily Octopodoidea. Species in the family Amphipetridae are characterised by having a single row of suckers on each arm (uniserial suckers), a gelatinous body and non hemispherical eyes.

species of mollusc

Opisthoteuthis, from Ancient Greek ὄπισθεν (ópisthen), meaning "back", and τευθίς (teuthís), meaning "squid", is a genus of cirrate octopuses, sometimes known as flapjack octopuses, which are found in all the world's oceans.

species of mollusc

species of mollusc

species of mollusc

Paroctopus is a small genus of octopuses from the family Octopodidae.

Cirroteuthis is a genus of cirrate octopus containing two species. It was the first genus (and contains the first species) of cirrate octopus to be described (in 1838). It is closely related to the genus Cirrothauma within the family Cirroteuthidae.

sport with divers catching octopuses barehanded

Cistopus is a genus of octopuses in the family Octopodidae from the Indo-Pacific region, colloquially known as old-lady octopuses. For a long time it was thought that Cistopus was monotypic with the type species, C. indicus, being the only known species. This species was characterised by the possession of eight small mucus filled pouches around the animal's mouth in the web between the bases of each arm, these have an opening which releases the mucus. The function of these pouches is unknown. A new species, C. taiwanicus was described in 2009 from Taiwan. Octopuses in the genus Cistopus are ha

species of mollusc

species of mollusc

species of mollusc

Enchoteuthis (meaning "spear squid") is an extinct genus of large enchoteuthine cephalopod that lived during the Cretaceous. Although it and its relative Tusoteuthis are often compared to squid, both are now thought to be more closely related to modern octopuses. Examination of gladius remains initially yielded an estimated mantle length of about based on one specimen once described as Tusoteuthis longa, which is close to or equal to that of the modern giant squid, although reclassification of this genus as a muensterelloid results in a longer total length, about . Three species are currently

Cirrothauma is a genus of deep water octopuses from the cirrate family Cirroteuthidae. The species of Cirrothauma are fragile, gelatinous deep-sea octopods with a large 'butterfly-shaped' shell.

species of mollusc

species of mollusc

species of mollusc

Palaeoctopodidae is an extinct family of incirrate octopuses that lived during the Late Cretaceous. It includes two genera, Keuppia and Palaeoctopus.

species of mollusc

species of mollusc

species of mollusc

species of mollusc

species of mollusc