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The seven-arm octopus is so named because in males, the hectocotylus (a specially modified arm used in egg fertilization) is coiled in a sac beneath the right eye. Due to this species' thick, gelatinous tissue, the arm is easily overlooked, giving the appearance of just seven arms. However, like other octopuses, it actually has eight. [5]
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 .
Macrotritopus Grimpe, 1922 (2 species) Octopus Cuvier, 1798 (99 species) Paroctopus Naef, 1923 (3 species) Pinnoctopus d'Orbigny, 1845 (2 species) Pteroctopus P. Fischer, 1882 (6 species) Robsonella Adam, 1938 (2 species) Scaeurgus Troschel, 1857 (5 species) Teretoctopus Robson, 1929 (2 species) Thaumoctopus Norman & Hochberg, 2005 (monotypic)
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 ]
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.
To understand the inner details of octopus lives, researchers dived for about a month at a reef off the coast of Eilat, Israel, and tracked 13 octopuses for a total of 120 hours using several cameras.
Octopodiformes is a superorder of the subclass Coleoidea, comprising the octopuses and the vampire squid.All living members of Octopodiformes have eight arms, either lacking the two tentacles of squid (as is the case in octopuses) or modifying the tentacles into thin filaments (as in vampire squid).
Octopodidae — the family containing the majority of known octopus species. Pages in category "Octopodidae" The following 76 pages are in this category, out of 76 total.