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  1. Octopus - Wikipedia

    Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse invertebrates. Octopuses inhabit various ocean habitats, including coral reefs, …

  2. Octopus | Description, Behavior, Species, & Facts | Britannica

    Jan 21, 2026 · An octopus is any eight-armed cephalopod mollusk of the order Octopoda. The true octopuses are members of the genus Octopus, a large group of widely distributed shallow-water …

  3. Ten Wild Facts About Octopuses: They Have Three Hearts, Big ...

    Mar 13, 2024 · Octopuses, those whip-smart, bizarre cephalopods, embody everything creepy and mysterious about the sea. Their soft, squishy bodies, lurking in the oceans’ dark reaches, have …

  4. Octopus facts | Molluscs | BBC Earth

    Sep 22, 2024 · Octopuses are among the most unique, diverse, and intelligent marine invertebrates on Earth. Inhabiting environments from shallow shores to the dark, crushing depths of the deep sea, …

  5. Octopus - Types, Size, Anatomy, Habitat, Diet, Lifespan ...

    Oct 31, 2025 · Octopuses are exclusively marine mollusks that constitute the order Octopoda within Cephalopoda, a class that also includes squids, cuttlefish, and nautiloids. They are easily recognized …

  6. Octopus | National Geographic Kids

    The octopus performs its famous backward swim by blasting water through a muscular tube on the body called a siphon. Octopuses also crawl along the ocean’s floor, tucking their arms into small...

  7. Octopus: Facts about the 8-armed geniuses of the sea | Live ...

    Feb 12, 2025 · Octopuses are famous for their bizarre bodies, quick thinking and mischievous personalities. There are more than 300 species of octopus that scientists know about, and likely …