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  2. Cephalopod intelligence - Wikipedia

    en.wikipedia.org/wiki/Cephalopod_intelligence

    Cephalopods have large, well-developed brains, [8] [9] [10] and their brain-to-body mass ratio is the largest among the invertebrates, falling between that of endothermic and ectothermic vertebrates. [11] The nervous system of cephalopods is the most complex of all invertebrates.

  3. Octopus - Wikipedia

    en.wikipedia.org/wiki/Octopus

    An octopus (pl.: octopuses or octopodes [a]) is a soft-bodied, eight-limbed mollusc of the order Octopoda (/ ɒ k ˈ t ɒ p ə d ə /, ok-TOP-ə-də [3]).The order consists of some 300 species and is grouped within the class Cephalopoda with squids, cuttlefish, and nautiloids.

  4. Giant Pacific octopus - Wikipedia

    en.wikipedia.org/wiki/Giant_Pacific_octopus

    The octopus brain has folded lobes (a distinct characteristic of complexity) and visual and tactile memory centers. They have about 300 million neurons. [23] They have been known to open tank valves, disassemble expensive equipment, and generally wreak havoc in labs and aquaria. [23]

  5. Amphioctopus fangsiao - Wikipedia

    en.wikipedia.org/wiki/Amphioctopus_fangsiao

    Amphioctopus fangsiao, called webfoot octopus, [2] is a species of octopus, a cephalopod belonging to the genus Amphioctopus. [3] It is found in the Pacific Ocean, including off the coasts of New Zealand [4] as well as in the Yellow Sea and surrounding Chinese shores. It is also commercially fished. [5] [6]

  6. Cephalopod - Wikipedia

    en.wikipedia.org/wiki/Cephalopod

    [12]: 2 These chromatophores are found throughout the body of the octopus, however, they are controlled by the same part of the brain that controls elongation during jet propulsion to reduce drag. As such, jetting octopuses can turn pale because the brain is unable to achieve both controlling elongation and controlling the chromatophores. [ 40 ]

  7. Common octopus - Wikipedia

    en.wikipedia.org/wiki/Common_octopus

    Octopus vulgaris grows to 25 cm (10 inches) in mantle length with arms up to 1 m (3.3 feet) long. [3] It lives for 1–2 years and may weigh up to 9 kg (20 pounds). [4] [5] Mating may become cannibalistic. [6] O. vulgaris is caught by bottom trawls on a huge scale off the northwestern coast of Africa. More than 20,000 tonnes (22,000 short tons ...

  8. Giant Pacific Octopus Going in for a Vet Appointment Has ...

    www.aol.com/giant-pacific-octopus-going-vet...

    The vet shared footage of the octopus moving so majestically through the water as she shared the unfortunate news. "[We] confirmed he has a Vibrio infection," she wrote in the video's caption.

  9. Cephalopod eye - Wikipedia

    en.wikipedia.org/wiki/Cephalopod_eye

    Cephalopods, as active marine predators, possess sensory organs specialized for use in aquatic conditions. [1] They have a camera-type eye which consists of an iris, a circular lens, vitreous cavity (eye gel), pigment cells, and photoreceptor cells that translate light from the light-sensitive retina into nerve signals which travel along the optic nerve to the brain. [2]