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Does an octopus have bones?

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No. With the exception of a hard beak used to kill and dismember pray, they are invertebrates composed entirely of soft tissue. No skeletal system allows the octopus to change its shape and squeeze through openings much more narrow than it would be able to pass with a rigid skeleton. read more

Only vertebrates have bones. Other animals can have hard parts such as beaks or shells, but those parts can never be true bone because it takes vertebrate DNA to make bone. An octopus is not a vertebrate. read more

Much larger sizes have been claimed for the giant Pacific octopus: one specimen was recorded as 272 kg (600 lb) with an arm span of 9 m (30 ft). 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). read more

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