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Diagram of octopus from side, with gills, funnel, eye, ocellus (eyespot), web, arms, suckers, hectocotylus and ligula labelled. The skin consists of a thin outer epidermis with mucous cells and sensory cells and a connective tissue dermis consisting largely of collagen fibres and various cells allowing colour change. [26]
Octopus (lit. 'eight foot') 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 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 octopus Thaumoctopus mimicus is known to mimic a number of different venomous organisms it cohabitates with to deter predators. [46] While background matching, a cephalopod changes its appearance to resemble its surroundings, hiding from its predators or concealing itself from prey.
Hectocotyli are shaped in many distinctive ways, and vary considerably between species. The shape of the tip of the hectocotylus has been much used in octopus systematics. Many coleoids lack hectocotyli altogether. [6] Among Decapodiformes (ten-limbed cephalopods), generally either one or both of arms IV are hectocotylized.
Recently, scientists have witnessed a species of octopus, the gloomy octopus (Octopus tetricus), engaging in even more extraordinary acts than previously Find Out Why These Octopuses Throw Things ...
In the video above, the scientist explains that this particular species of octopus has "beaks for mouths and their brains are donut-shaped and surround their esophagus. The researcher goes on to ...
Amphioctopus aegina, commonly referred to as the marbled octopus or the sandbird octopus, [2] is a bottom dwelling species residing in the coastal zone of the Indo-West Pacific. [ 3 ] Planktonic hatchlings and eggs are laid by females predominantly during the months of January and October, however they have been known to reproduce year-round.