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It depends on which type of octopus you are refering to. Generally, as the name implies, octopuses have eight arms(NOT tentacles like those of the squid); the bottoms of these are covered in suckers used to catch prey and grip things. In the middle of the arms is a parrot-like beak used to crush and eat shells of prey. The beak is the hardest part of the body, which allows the animal to squeeze into the smallest of spaces. The head/mantle is the main part of the body and holds all of the creature's organs. Octopuses have three hearts, and blue blood; the color of the blood is due to the lack of red blood cells and abundance of plasma. They also have gills and a jet propulsion siphon. Many can change colors to suit their environment and help camouflage themselves. Most can squirt ink to escape predators. Some are capable of losing limbs and later growing them back. The reproductive organ of the male octopus is located in one of its arms. It is inserted into the mantle cavity of the female to reproduce. Octopuses are actually regarded as the smartest invertebrate Beyond all this, check the Wikipedia article here: http://en.wikipedia.org/wiki/Octopus

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16y ago

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