Octopus

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Octopus

Octopus (/ɒkˈtəʊpəs/; from Greek: ὀκτώπους, októpous, "eight-footed") is a soft-bodied, eight-limbed mollusc of the order Octopoda. Around 300 species are recognised, and the order is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.

Etymology

The word octopus comes from the Greek, ὀκτώπους, októpous, meaning "eight-footed". The term may have originally been a diminutive form of a word for "eight-footed animal".

Anatomy

Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse of all invertebrates. They inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths.

Behaviour

Octopuses are known for their escape artistry, playfulness, and problem-solving capabilities. They have been observed using tools, mimicking other octopuses, and exhibiting play behaviour.

Related Terms

  • Cephalopoda: The class of marine molluscs that octopuses belong to.
  • Mollusca: The phylum that includes octopuses and other soft-bodied invertebrates.
  • Invertebrate: Animals that do not have a backbone, like octopuses.
  • Coral reef: One of the diverse habitats where octopuses can be found.
  • Pelagic zone: The open ocean where some species of octopuses live.
  • Seabed: The bottom of the ocean where many octopuses reside.
  • Intertidal zone: The area between high and low tide where some octopuses can be found.
  • Abyssal zone: The deep sea environment where certain species of octopuses live.

External links

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