   Octopus
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Sigma KEE - Octopus
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Octopus
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The octopus is a cephalopod mollusc of the order Octopoda. It has two eyes and four pairs of arms and, like other cephalopods, it is bilaterally symmetric. It has a beak, with its mouth at the center point of the arms. It has no internal or external skeleton (although some species have a vestigial remnant of a shell inside their mantles), allowing it to squeeze through tight places. Octopuses are among the most intelligent and behaviorally diverse of all invertebrates. [Wikipedia]
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軟体動物 |
Soft-bodied Invertebrate that is usually contained in a shell. Includes oysters, clams, mussels, snails, slugs, octopi, and squid.
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