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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]
Cephalopod limbs bear numerous suckers along their ventral surface as in octopus, squid and cuttlefish arms and in clusters at the ends of the tentacles (if present), as in squid and cuttlefish. [9] Each sucker is usually circular and bowl-like and has two distinct parts: an outer shallow cavity called an infundibulum and a central hollow ...
An octopus displaying its suckers. Cephalopods are characterised by elongated appendages known as cephalopod limbs for locomotion and grasping objects. There are two main types: arms, such as in octopus, bearing numerous suckers along its ventral surface; and tentacles, such as in squid and cuttlefish, having a single sucker at the tip. [12]
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.
American zoologist G. H. Parker found that the largest suckers on a giant Pacific octopus are about 6.4 cm (2.5 in) and can support 16 kg (35 lb) each. [3] The only other possible contender for the largest species of octopus is the seven-arm octopus ( Haliphron atlanticus ), based on a 61-kilogram (134-pound), incomplete carcass estimated to ...
Then, the octopus returns to the bottle to work on getting the fish out. Although it can reach its arm inside and taste the fish using the suckers on its tentacle, it can’t get the fish to fit ...
The octopus grabbed her hand and led her to something that it knew didn't belong on the ocean floor. Watch as the octopus shows her the 'mysterious structure' it had found! What an incredible ...
An octopus displaying its suckers with central cavity of acetabulum. Acetabulum in molluscs is a circular hollow opening on the arms. It occupies the central portion of the sucker and surrounded by a larger spherical cavity infundibulum. Both these structures are thick muscles, and the acetabulum is specifically composed of radial muscles.