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Many octopus arm anomalies have been recorded, [13] [14] including a 6-armed octopus (nicknamed Henry the Hexapus), a 7-armed octopus, [15] a 10-armed Octopus briareus, [16] one with a forked arm tip, [17] octopuses with double or bilateral hectocotylization, [18] [19] and specimens with up to 96 arm branches.
The following is a list of selected animals in order of increasing number of legs, from 0 legs to 653 pairs of legs, the maximum recorded in the animal kingdom. [1] Each entry provides the relevant taxa up to the rank of phylum. Each entry also provides the common name of the animal.
Much larger sizes have been claimed for the giant Pacific octopus: [21] one specimen was recorded as 272 kg (600 lb) with an arm span of 9 m (30 ft). [22] A carcass of the seven-arm octopus , Haliphron atlanticus , weighed 61 kg (134 lb) and was estimated to have had a live mass of 75 kg (165 lb).
All living cephalopods have a two-part beak; [12]: 7 most have a radula, although it is reduced in most octopus and absent altogether in Spirula. [ 12 ] : 7 [ 98 ] : 110 They feed by capturing prey with their tentacles, drawing it into their mouth and taking bites from it. [ 25 ]
[8] [9] [10] They have also been observed keeping "gardens", in which they collect various marine plant life and algae, alongside collections of shells and rocks; this behavior may have inspired the 1969 Beatles title, "Octopus' Garden". O. vulgaris was the first invertebrate animal protected by the Animals (Scientific Procedures) Act 1986 in ...
Researchers have identified an extinct vampire squid-like creature that is the first of its kind with 10 functional arms. The earliest known relative of octopuses and vampire squid has been named ...
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.
They have fins above their eyes, similar to those found on some species of squid. Their maximum size is 20 cm (7.9 in) mantle length. [5] They have eight arms (like any other octopus), but these affixed together in an umbrella shape. [6] However unlike other octopus, they are unable to camouflage by changing skin color and texture. [7]