Plants and Animals

Do cephalopods have shells?

Link to this answer

CloseClose

Link to this answer

Share this credible answer with others. Simply paste this code into your blog or Web page:

<a href="http://qanda.encyclopedia.com/question/do-cephalopods-have-shells-118482.html" >Do cephalopods have shells?</a>
E-mail this answer Link to this answer

Only one existing genus, the nautiluses, the sole survivors of an extinct group known as the nautiloids, possesses an external shell. In the squid and cuttlefish the shell has become internalized and reduced, and in the octopus it is completely absent.

Answer verified with
Get more facts and information about cephalopod . Or, view the full encyclopedia entry from The Columbia Encyclopedia, Sixth Edition.

Similar questions: Do most cephalopods lack shells? Are there any cephalopods with shells? What cephalopods have shells? [ Hide these questions ]

Related research questions

Related research articles

Not such suckers. (cephalopods are fairly sophisticated creatures)
Magazine article from: The Economist (US) ...some invertebrates have a claim to higher...how to look after cephalopods (octopuses and squid...Most invertebrates do not invest heavily...brother molluscs they do not protect themselves with heavy shells. Nor do they live...snail's pace. They have ditched their armour...
Cuttlebone Morphology Limits Habitat Depth in Eleven Species of Sepia...
Magazine article from: The Biological Bulletin ...speciose cephalopod genus with a chambered shell. Sections...chambered shells of cephalopods serve as...so they do not change...However, the shells must be strong...chambered shell is too dense...their fresh shells) can be...estimate shell strength...approaches ...
Octopus's garden: Current Science editor Rene Ebersole went scuba diving in the...
Magazine article from: Current Science, a Weekly Reader publication ...Cigliano, "octopuses do not have tentacles. They have arms--eight of them. Squid have [arms and] tentacles...it comes to the cephalopods, a group of animals...protected by a hard shell. Some cephalopods...octopus, lack outer shells. Why? Cigliano...
Live shellfish require special treatment: do your part to counter negative...
Magazine article from: Seafood Business ...Animals with two shells that close, such...Animals with a single shell that houses their...snails) and abalone. Cephalopods: Animals with soft bodies and internal shells, like the hard...opens and closes the shell. Univalves and cephalopods...sea animals that have external ...
Armed but not dangerous: is the octopus really the invertebrate intellect of...
Magazine article from: National Wildlife ...any oyster. They have to be: Like their fellow cephalopods, squid and cuttlefish...their external shells millions of years...years, scientists have tested octopus...they learned to do so more quickly...Critics since then have weighed in with...
See all results at HighBeam

HighBeam gives you access to newspaper, magazine, and trade journal articles plus press releases, facts, information, and biographies from thousands of sources.