What are the differences between an an arachnid and a crustacean? what is similar? are they often confused?

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  • 1 decade ago
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    Crustaceans are not mammals!

    I think number of legs come into it too... Arachnids have 8 legs, while Crustaceans have 10 legs.

    Source(s): I saw it on QI!
  • 1 decade ago

    arachnids includes crustaceans in its family so

    all crustaceans are arachnids but not all arachnids are crustaceans

    crustaceans are arachnids with two segments and a very hard outer shell

    and no, there are crustaceans that live on land

  • 1 decade ago

    Far as I know, an arachnid lives on the land (Spiders & such) a crustacean lives in the sea/water.(crabs)

  • Anonymous
    1 decade ago

    arachnid is an insect, while crustacean is mammal? hehe

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