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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

    Dec 31, 2025 · 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. 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 …

  4. Octopus | National Wildlife Federation

    Octopuses are found in every ocean of the world and along every coast of the United States. Octopuses live in coastal marine waters and spend much of their time in dens—small holes and crevices in …

  5. Octopuses, facts and information | National Geographic

    There are around 300 species of octopus and they are found in every ocean. Most live on the seafloor, but some, like the paper nautilus, drift nearer to the surface. Octopuses mostly feed on...

  6. Let’s learn about octopuses - Science News Explores

    Dec 17, 2024 · Octopuses are about as strange as any fictional aliens we might dream up. Each of these soft-bodied cephalopods has eight arms attached to its head. And each of those arms is lined …

  7. 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, …