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The giant Pacific octopus (Enteroctopus dofleini) is often cited as the largest known octopus species. Adults usually weigh around 15 kg (33 lb), with an arm span of up to 4.3 m (14 ft). [ 19 ] The largest specimen of this species to be scientifically documented was an animal with a live mass of 71 kg (157 lb). [ 20 ]
The common octopus (Octopus vulgaris) is a mollusk belonging to the class Cephalopoda. Octopus vulgaris is one of the most studied of all octopus species, and also one of the most intelligent. It ranges from the eastern Atlantic, extends from the Mediterranean Sea and the southern coast of England , to the southern coast of South Africa.
The species is known from 48 specimens. [5] It is most similar to its sister taxon, Cirroctopus mawsoni; [1] however, C. mawsoni's ventral pigmentation is lighter, and the two species have been found in very different areas (C. mawsoni is only known in waters near Antarctica). [5] [6] This octopus lives near cold seeps and seamounts. [6]
Protection of other threatened species may affect octopus populations (the sea otter, for example), as they may rely on octopuses for food. Some research suggests that fishing other species has aided octopus populations, by taking out predators and competitors. [citation needed]
The World's 100 most threatened species [1] is a compilation of the most threatened animals, plants, and fungi in the world. It was the result of a collaboration between over 8,000 scientists from the International Union for Conservation of Nature Species Survival Commission (IUCN SSC), along with the Zoological Society of London . [ 2 ]
Octopus is the largest genus of octopuses, comprising about 100 species.These species are widespread throughout the world's oceans. Many species formerly placed in the genus Octopus are now assigned to other genera within the family.
The IUCN Red List of Threatened Species by the International Union for Conservation of Nature is the best known worldwide conservation status listing and ranking system. . Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmenta
Octopus tetricus, the gloomy octopus, the common Sydney octopus, [3] or the peachy octopus, [4] is a species of octopus from the subtropical waters of eastern Australia and northern New Zealand. [2] O. tetricus belongs to the Octopus vulgaris species group. All species within the O. vulgaris group are similar in morphology, [5] behaviour, and ...