Argonautidae
The Argonautidae, commonly known as paper nautilus or argonauts, are a family of pelagic octopuses in the order Octopoda. They are the only cephalopods that build their own shells. The shells are not true shells, but rather a thin, papery structure secreted by the female. The shell is used to protect the eggs and the female herself.
Common Names
Argonautidae are commonly called paper nautilus or argonauts. The name "paper nautilus" comes from the thin, papery shell they build, which resembles the shell of a nautilus. The name "argonaut" comes from the Greek myth of Jason and the Argonauts, who sailed on a ship named Argo.
Characteristics
Argonautidae have several distinctive characteristics, including:
- Shells: Only the female builds a shell, which she uses to protect her eggs and herself. The shell is thin, papery, and spiraled. It is not attached to the animal's body and is secreted by two specialized arms, the "dorsal arms."
- Size: Argonauts are relatively small octopuses, with females reaching up to 10 inches (25 cm) in length. Males are significantly smaller, measuring only about 1 inch (2.5 cm).
- Webbed Arms: Argonauts have webbed arms that they use to help them swim and maneuver. They are also used to help the female hold her shell.
- Color: Argonauts are typically brown or reddish-brown in color, with some species having white or yellow markings.
Environment
Argonautidae are pelagic octopuses, meaning they live in the open ocean, not on the seabed. They are found in warm waters around the world, typically in tropical and subtropical regions. They prefer waters with low salinity and high oxygen levels.
References
For more information, refer to the following websites: