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Apr 10, 2024 · Cephalopod, any member of the class Cephalopoda of the phylum Mollusca, a small group of highly advanced and organized, exclusively marine animals. The octopus, squid, cuttlefish, and chambered nautilus are familiar representatives. Learn more about cephalopods in this article.
A common octopus with a forked arm that was found in South Crete, Greece. All cephalopods possess flexible limbs extending from their heads and surrounding their beaks. These appendages, which function as muscular hydrostats, have been variously termed arms, legs or tentacles. [A] Description.
Danielle Hall. Reviewed by Michael Vecchione, Smithsonian Institution. A highly intelligent group of ocean dwelling creatures, the living cephalopods include the eight-armed octopuses, the ten-armed squids and cuttlefishes, and the shelled chambered nautiluses.
cephalopod , Any marine mollusk of the class Cephalopoda (e.g., cuttlefish, nautilus, octopus, and squid), which includes the most active and largest living invertebrates. Cephalopods are bilaterally symmetrical and typically have a highly developed centralized nervous system.
Dec 20, 2023 · Cephalopods (Cephalopoda) Gordon Ramel December 20, 2023. 0 26 10 minutes read. Cephalopods are a remarkable class of marine invertebrates, including octopuses, squid, cuttlefish, and nautiluses. Ranging from shallow tropical waters to cold ocean depths, over 800 extant species exist worldwide.
(Created by Ashley Gallagher for the Ocean Portal) The cephalopods are a diverse class of mollusks. Today, scientists divide the living cephalopods into three groups, called superorders. Many details of cephalopod evolutionary classification continue to change as scientists find new clues from genetic testing and newly discovered fossils.
Form and function. blue-ringed octopus. Blue-ringed octopus (genus Hapalochlaena) Cephalopods vary from elongate, streamlined oceanic organisms to saccular, slow-moving bottom and drifting forms. Their body plan is indicative in many ways of the habitat in which they dwell and their mode of life.
