Cephalopod - Wikipedia
WebAbout 800 living species of cephalopods have been identified. Two important extinct taxa are the Ammonoidea (ammonites) and Belemnoidea (belemnites). Extant cephalopods range in size from the 10 mm (0.3 in) Idiosepius thailandicus to the 14 m (45.1 ft) colossal squid, the largest extant invertebrate .
Cephalopod | Definition, Etymology, Species, & Facts | Britannica
WebApr 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.
Cephalopods | Smithsonian Ocean
WebThe cephalopods are a diverse class of mollusks (a group that also includes snails and bivalves) that emerged during an explosion of animal diversity in the oceans during the Cambrian period, over 500 million years ago (mya). Today, scientists divide the living cephalopods into three groups, called superorders.
Cephalopods: Facts about octopus, squid, nautilus and more
Webpublished 13 October 2021. Cephalopods are often characterized by their tentacles, creative camouflage, inky getaways and impressive feats of intelligence. Cephalopods are a group of marine ...
General features of cephalopods | Britannica
Webcephalopod , 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.
Cephalopods | Animals | Monterey Bay Aquarium
WebWhat's a cephalopod? A cephalopod is an animal belonging to the group Cephalopoda, containing octopus, squid, cuttlefish, nautilus, and kin. The word “cephalopod” is derived from Greek and means “head foot,” which perfectly describes animals that have eyes just above their many limbs.
Cephalopod - Tentacles, Jet Propulsion, Camouflage | Britannica
WebCephalopods 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. The viscera of a generalized cephalopod are covered by a dome-shaped or elongated sheath of muscle, the mantle, which is connected ...
Cephalopod Class: Species, Habitats, and Diets - ThoughtCo
WebDec 13, 2019 · Jennifer Kennedy. Updated on December 13, 2019. Cephalopods are mollusks ( Cephalopoda ), a class which includes octopuses, squid, cuttlefish, and nautilus. These are ancient species that are found in all of the world's oceans, and are thought to have originated about 500 million years ago.
Cephalopods (Cephalopoda) | Marine Invertebrates | Earth Life
WebDec 20, 2023 · 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. Cephalopods are characterized by prominent heads, beak-like jaws, and arms or tentacles used for grasping prey.
The Cephalopoda - University of California Museum of Paleontology
WebCephalopods are the most intelligent, most mobile, and the largest of all molluscs. Squid, octopuses, cuttlefish, the chambered nautilus, and their relatives display remarkable diversity in size and lifestyle with adaptations for predation, locomotion, disguise, and communication. These "brainy" invertebrates have evolved suckered tentacles ...
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