ARGONAUT

Argonaut

The argonauts are a group of pelagic octopuses. They are also called paper nautiluses, referring to the paper-thin eggcase that females secrete. This structure lacks the gas-filled chambers present in chambered nautilus shells and is not a true cephalopod shell, but rather an evolutionary innovation unique to the genus Argonauta. It is used as a brood chamber and for trapped surface air to maintain buoyancy.

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argonaut

Noun

  1. A pelagic octopus of the genus Argonauta.
  2. An adventurer on a dangerous but rewarding quest.


The above text is a snippet from Wiktionary: argonaut
and as such is available under the Creative Commons Attribution/Share-Alike License.

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