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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]
Download as PDF; Printable version; In other projects ... Octopodidae — the family containing the majority of known octopus species. ... Octopus (genus) Octopus ...
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 World Register of Marine Species lists these 23 genera: [1] Abdopus Norman & Finn, 2001 (7 species) Ameloctopus Norman, 1992 (monotypic) Amphioctopus P. Fischer, 1882 (16 species) Callistoctopus Taki, 1964 (11 species) Cistopus Gray, 1849 (4 species) Euaxoctopus Voss, 1971 (3 species) Galeoctopus Norman, Boucher & Hochberg, 2004 (monotypic)
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 .
Depending on the species, the male may use it merely as a conduit to the female, analogously to a penis in other animals, or he may wrench it off and present it to the female. The hectocotyl arm was first described in Aristotle's biological works. Although Aristotle knew of its use in mating, he was doubtful that a tentacle could deliver sperm.
Awesome New Camouflage Sheet Was Inspired By Octopus Skin. Octopuses and squid are known for their abilities to blend in with their surroundings at the drop of a hat to hide from dangerous predators.
Family Alloposidae: seven-arm octopus; Family Argonautidae: argonauts; Family Ocythoidae: tuberculate pelagic octopus; Family Tremoctopodidae: blanket octopus; Note: A new unnamed white species was discovered February 26, 2016 by NOAA’s Deep Discoverer about 2.5 miles below the ocean surface near the Hawaiian Archipelago. [2]