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  1. Cuttlefish - Wikipedia

    Cuttlefish, or cuttles, are marine molluscs of the family Sepiidae. They belong to the class Cephalopoda which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique …

  2. Cuttlefish | Description, Anatomy, & Facts | Britannica

    Dec 19, 2025 · cuttlefish, any of several marine cephalopods of the order Sepioidea, related to the octopus and squid and characterized by a thick internal calcified shell called the cuttlebone.

  3. Cuttlefish - Description, Habitat, Image, Diet, and ...

    Cuttlefish, the ocean’s masters of disguise, are cephalopod mollusks renowned for their intelligence, sophisticated camouflage, and unique physiology. Often described as living …

  4. Cuttlefish Fact Sheet | Blog | Nature | PBS

    Nov 8, 2023 · There are more than 120 species of cuttlefish. They are found in the order Sepiida and are grouped into six families divided between two suborders. Depending on the species, …

  5. Common cuttlefish - Animals | Monterey Bay Aquarium

    Meet the common cuttlefish. With its eight arms and two tentacles, the cuttlefish is ready to hunt. When a shrimp or fish is in range, the cuttlefish aims and shoots out its two tentacles to seize …

  6. Cuttlefish, facts and photos | National Geographic

    Despite their name, cuttlefish are not fish but intelligent invertebrates related to the octopus, squid, and nautilus. These fascinating creatures can count, exert self-control, and have …

  7. Cuttlefish (Sepia) - Ocean Info

    Common Cuttlefish (Sepia officinalis): Found in the Mediterranean Sea, North Sea, and parts of the Atlantic Ocean, this species is known for its large size (up to 49 cm in mantle length) and …

  8. It has three hearts, changes colour as fast as you can blink ...

    Jan 9, 2026 · Cuttlefish can change colour in 200 milliseconds, as fast as a human can blink. Cuttlefish have W-shaped pupils, which are thought to help control the intensity of light …

  9. Cuttlefish Animal Facts - A-Z Animals

    Nov 8, 2019 · Discover cuttlefish — intelligent cephalopods with color-changing skin, three hearts, ancient origins, and remarkable camouflage abilities.

  10. What Is a Cuttlefish? Habitat, Diet, and Care - Biology Insights

    Aug 9, 2025 · Cuttlefish are marine mollusks classified within the class Cephalopoda, a group that also encompasses octopuses and squids. These invertebrates are known for their intelligence …