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") [3] such as a squid, octopus, cuttlefish, or nautilus.

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.

Most cephalopod eyes, like human eyes, contain an iris, pupil, lens, and in some cases, a cornea. Octopus, squid, cuttlefish, and nautilus all have differently shaped pupils— an octopus has a rectangular pupil, a cuttlefish has a w-shaped pupil, and a squid’s pupil is circular.

2021年10月13日 · 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 ...

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 , 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.

2024年5月31日 · What is a cephalopod. Where do they live. What do they eat. How do they move and reproduce. Also, learn their anatomy, habitat, lifespan, and evolution with images.

2023年12月20日 · By examining cephalopod evolution and the fossil record, scientists gain insight into the emergence of key traits like vision, jet propulsion, behavioral complexity, and shell loss that characterize modern cephalopods.

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.

Shells inside the body still exist in many living cephalopod groups, such as cuttlefish. The most famous group with external shells, the ammonites, became extinct at the end of the Cretaceous period.