do a octopus have bones?
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And octopus is a mollusk. Therefore, an octopus does not have any bones.
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Three defensive mechanisms are typical of octopuses: ink sacs, camouflage, and autotomising limbs. Most octopuses can eject a thick blackish ink in a large cloud to aid in escaping from predators. ... A few species, such as the Mimic Octopus, have a fourth defense mechanism.
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Octopus / squids have one primary heart to pump the oxygenated blood throughout their body and they have two more operational hearts to pump blood to their gills.
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Because if it had ten legs it would be a decapus not an octopus. Having eight legs appears to be a fairly common number. It is symmetrical (which is usually a favorable trait) and has some amount of redundancy. It also allows for a high level of dexterity and strength.
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Squid and octopus are both a good source of zinc, manganese, copper, selenium, riboflavin, and vitamin B12. They are also an essential source of amino acids. ... Octopus is low in calories, lean, and is a great way to get protein into your diet without consuming a lot of fat.
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These tiny jaws can be seen in the image below, near the head of the creature. Like the other acoelomate phyla, these animals have no body cavity. The space between their skin and intestines is packed with muscles and filler cells.
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Octopuses depend on water to breathe, so in addition to being a cumbersome mode of transportation, the land crawl is also a gamble. ... This allows the octopus to survive on land for short periods of time, because oxygen is absorbed through the skin, instead of the gills.
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Strictly speaking, the octopuses (Octopoda) are an order, rather than a family. ... The squids are in the order Teuthoidea; they possess an internal shell, and have stalked suckers, or sometimes hooks. They also have eight arms, but in addition most have two longer tentacles, used for capturing prey.
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They are foraging predators and eat pelagic invertebrates that swim above the sea floor. As there are few large predators in the deep sea, dumbo octopuses' primary predators are diving fishes and marine mammals, including tunas, sharks, and dolphins.
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They're related to other jellyfish, of course, but they also have more distant cousins that are different kinds of animals, in the same way humans are related to apes. ... But often, people will guess that jellyfish are related to cephalopods—octopuses or squids—since they all have tentacles.
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Most octopi life cycles are first eggs, which then hatch and become paralarvae (a few millimeters in length), which float through the oceans for a while, which then settle and become very small octopus, which grow and become "baby" octopus and then if not eaten adult octopus.
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Octopuses are nutritious, with loads of lean muscle in those amazing arms, and plenty of good minerals. Octopuses are a popular entrée for plenty of predators—including us humans. And for good reason. Octopuses are nutritious, with loads of lean muscle in those amazing arms, and plenty of good minerals.
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In case you were wondering (cause they are soooo flexible), snakes actually do have bones. Animals with bones are know as vertebrates -- snakes are vertebrates. A snake's backbone is made up of many vertebrae attached to ribs.
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Like all other cephalopods, squid have a distinct head, bilateral symmetry, and a mantle. They are mainly soft-bodied, like octopuses, but have a small internal skeleton in the form of a rod-like gladius or pen, made of chitin.
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Generally, arms have suckers along most of their length, as opposed to tentacles, which have suckers only near their ends. Barring a few exceptions, octopuses have eight arms and no tentacles, while squid and cuttlefish have eight arms (or two "legs" and six "arms") and two tentacles.
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But is the octopus truly alive at this point? Not really. Octopus limbs can't sprout new parts like a starfish can, and they decompose quickly. They are, however, full of neurons, which act in concert with the creature's brain and continue to fire after death.
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Octopuses are ocean creatures that are most famous for having eight arms and bulbous heads. Some other fun facts: They have three hearts and blue blood; they squirt ink to deter predators; and being boneless, they can squeeze into (or out of) tight spaces. They are quite intelligent and have been observed using tools.