The Paper Nautilus or Argonaut

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Despite the name, the Paper Nautilus is not a true nautilus (due to lacking a chambered shell) but rather an octopus that secretes a thin shell to protect her eggcase. This species also have extreme sexual dimorphism where the males are tinier than the females!

The one you see the in video above is a female.


Here is the much tinier male, which is much more harder to find due to his size and a short life span.