Cephalopoda
Cephalopoda
Cephalopoda (pronunciation: /ˌsɛfəˈlɒpədə/) is a class of marine mollusks that includes species such as squids, octopuses, and cuttlefish. The term is derived from the Greek words 'kephalē', meaning 'head', and 'pous', meaning 'foot'.
Etymology
The term 'Cephalopoda' is derived from the Greek words 'kephalē', meaning 'head', and 'pous', meaning 'foot'. This is in reference to the way the cephalopod's head is connected to its foot, which has been modified into a set of tentacles.
Characteristics
Cephalopods are characterized by bilateral body symmetry, a prominent head, and a set of tentacles or arms. They are known for their exceptional intelligence among invertebrates, with complex behavior and advanced learning capabilities. Most cephalopods are fast swimmers and many can change skin color and pattern in a fraction of a second.
Classification
Cephalopoda is divided into several orders, including Octopoda (octopuses), Decapodiformes (squids and cuttlefish), and Nautiloidea (nautiluses). Each order is further divided into families, genera, and species.
Related Terms
- Mollusca: The phylum to which cephalopods belong.
- Invertebrate: An animal without a backbone. Cephalopods are the most intelligent of the invertebrates.
- Camouflage: Many cephalopods can change the color and pattern of their skin to blend in with their surroundings.
- Beak: Cephalopods have a hard, sharp beak used to kill and tear apart prey.
- Ink sac: An organ found in many cephalopods, used to expel a cloud of dark ink to confuse predators.
External links
- Medical encyclopedia article on Cephalopoda
- Wikipedia's article - Cephalopoda
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