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Octopuses can maintain a constant oxygen uptake even when oxygen concentrations in the water decrease to around 3.5 kPa (0.51 psi) [22] or 31.6% saturation (standard deviation 8.3%). [17] If oxygen saturation in sea water drops to about 1–10% it can be fatal for Octopus vulgaris depending on the weight of the animal and the water temperature ...
An octopus (pl.: octopuses or octopodes [a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ ɒ k ˈ t ɒ p ə d ə /, ok-TOP-ə-də [3]). The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.
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 creatures are known as dumbo octopuses because of their “large” fins. ‘Cutest octopus in the world’ seen for the first time in Southeast Pacific. See video
Researchers have found high concentrations of heavy metals and PCBs in tissues and digestive glands, which may have come from these octopus' preferred prey, the red rock crab (Cancer productus). [59] These crabs bury themselves in contaminated sediments and eat prey that live nearby. [3]
Juvenile and adult algae octopuses have a unique method of locomotion. In addition to the common tactics of swimming, crawling and jetting, algae octopuses participate in upright, bi-pedal locomotion. This is a fast method of movement used for escape and often paired with crypsis, or camouflage to mimic surrounding sea grass. [4]
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Like other cirrates, octopuses in Opisthoteuthis are generally small, and many dwell in the deep sea. They have cirri on their arms, internal shells to support their bodies, and muscular fins for steering. [3] Like octopuses of Grimpoteuthis, opisthoteuthids have been seen resting or crawling on the seafloor. [4]