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Opisthoteuthis mero, commonly known as Mero's umbrella octopus, [3] is a species of cirrate octopus from demersal habitats surrounding New Zealand. O. mero is the most documented New Zealand Opisthoteuthis species, with over 100 reference specimens. [4] O. mero reaches a maximum length of 34 cm (13 in), and a mantle length of 9 cm (3.5 in). [5]
Estimations of egg hatching time (using water temperature and egg size) for O. californiana are up to 1.4 years at 4°C. [11] [12] Mating has never been observed in O. californiana; the males lack the hectocotylus of typical octopus, instead having a series of enlarged suckers that presumably have a role in mating or competition. [11]
Like other cirrates, octopuses in Opisthoteuthis are generally small, and many dwell in the deep sea. They have cirri on their arms, internal shells to support their bodies, and muscular fins for steering. [3]
O. depressa is a small octopus. The animal's maximum size, measured from one arm tip to the opposite, is 200 mm (7.9 in). It has large eyes and small fins. Like other members of the cirrate octopus subgroup, it has a fleshy web connecting its arms, a small internal shell to support its body, fins to help it swim, and small fleshy tendrils called "cirri" lining its arms. [6]
A type of marine mollusc in the Cephalopod class of the Mollusca order — the Octopus. The preferred plural form is Octopuses. The main article for this category is Octopus .
Octopus oliveri, is a species of octopus found in the western Pacific Ocean off the coast of Japan, Hawaii, and Kermadec Island, in reefs and boulder coasts. [1] [2] It is a small species, roughly 70-260mm in length. [2] Females will take longer to mate, the larger their body size.
Opisthoteuthidae are a group of octopuses characterized by a web of skin in between their arms. They broad U-shaped shell that support muscles for a pair of small fins on the mantle, these fins are far less developed than other families in Cirrina and essentially only act as stabilizers when the animal swims (using a medusoid motion of the arms and webbing). [1]
O. tetricus belongs to the Octopus vulgaris species group. All species within the O. vulgaris group are similar in morphology, [5] behaviour, and physiology. [6] The English translation of O. tetricus (Latin) is 'the gloomy octopus'. [7] It is a significant species in the fishing industry in Australia.