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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.
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]
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.
There are 300 species of octopus and they can be found in every ocean in the world, even the Arctic Ocean. Many species are found in the twilight zone, while others live closer to shore in warmer ...
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Octopus bimaculoides observed at Nicholson Point in La Jolla, California in August, 2024. Close-up of the chromatophores on Octopus bimaculoides. The California two-spot octopus (Octopus bimaculoides), often simply called a "bimac", is an octopus species native to many parts of the Pacific Ocean including the coast of California. One can ...
The informally named Casper octopus species were first discovered in 2016 in the Pacific Ocean, in water off Hawaii. [1] The two distinct Casper species are new to science but have not yet been formally named with a binomial name as no specimens have yet been collected - they are only known from imagery. [1]
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 ...