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A cephalopod / ˈ s ɛ f ə l ə p ɒ d / is any member of the molluscan class Cephalopoda / s ɛ f ə ˈ l ɒ p ə d ə / (Greek plural κεφαλόποδες, kephalópodes; "head-feet") such as a squid, octopus, cuttlefish, or nautilus.These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats ...
Jul 5, 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. The extinct forms outnumber the living, the class having attained great diversity in late Paleozoic and Mesozoic times. The extinct cephalopods are the ammonites ...
Cephalopod literally means “head foot” in Greek, a reference to the way the cephalopod’s head connects to its many arms. The basic cephalopod body plan includes two eyes, a mantle, a funnel (also called a siphon), and at least eight arms. Some have hard, internal structures, like the cuttlebone in the cuttlefish and the pen in the squid ...
Oct 13, 2021 · The word cephalopod means "head foot" in Greek, referring to the fact that these two body parts are merged in these animals, according to the New World Encyclopedia.There is a wide variety of body ...
Jun 25, 2019 · Cephalopods are animals that belong to class Cephalopoda, which includes octopuses, squids, cuttlefish and chambered nautiluses. They can be huge or tiny, an...
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. Their image-forming eyes are similar in structure to vertebrate eyes, and their heads are armed with tentacles that ...
Traditional views of origin. The cephalopods were once thought to have evolved from a monoplacophoran-like ancestor with a curved, tapering shell, and to be closely related to the gastropods (snails). The similarity of the early shelled cephalopod Plectronoceras to some gastropods was used to support this view. The development of a siphuncle would have allowed the shells of these early forms ...
Jul 5, 2024 · Cephalopod - Tentacles, Jet Propulsion, Camouflage: Cephalopods vary from elongate, streamlined oceanic organisms to saccular, slow-moving bottom and drifting forms. In general, the viscera are covered by the mantle, and the central nervous system is highly developed. The sense organs are eyes, rhinophores, statocysts, and tactile organs. The first cephalopods probably had a simple, caplike shell.
Dec 20, 2023 · Cephalopod appendages take the form of arms, tentacles, or some combination thereof, depending on the species. Unlike many mollusks, cephalopods are carnivorous predators rather than filter feeders. Using their arms and tentacles, they capture live prey, including fish, shrimp, crabs, and other cephalopods. Their beak-like jaws tear food into ...
Cephalopods are an exclusively marine group comprising octopuses, cuttlefish, squids and nautiluses says Stuart Blackman
