Cuttlefish

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cuttlefish : any of various marine cephalopod mollusks (order Sepioidea, especially genus Sepia) having eight short arms and two usually longer tentacles and differing from the related squid in having a calcified internal shell — Webster

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Cuttlefish or cuttles are marine molluscs of the order Sepiida. They belong to the class Cephalopoda, which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone. Cuttlefish also have large, W-shaped pupils, eight arms, and two tentacles furnished with denticulated suckers, with which they secure their prey. They generally range in size from 15 to 25 cm (6 to 10 in), with the largest species, Sepia apama, reaching 50 cm (20 in) in mantle length and over 10.5 kg (23 lb) in mass. — Wikipedia

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Scientists give cuttlefish 3D glasses and shrimp films for vision study (Ian Sample, The Guardian)
Cuttlefish use stereopsis to strike at prey (R. C. Feord, et al., Science Advances)

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Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • The mysterious, legendary giant squid's genome is...
    on January 16, 2020 at 7:47 am

    How did the monstrous giant squid—reaching school-bus size, with eyes as big as dinner plates and tentacles that can snatch prey 10 yards away—get so scarily big?

  • 3-D movies reveal how cuttlefish determine...
    on January 8, 2020 at 7:00 pm

    While cuttlefish wearing glasses is an unexpected sight, a University of Minnesota-led research team built an underwater theater and equipped the cephalopods with specialized 3-D glasses to investigate how cuttlefish determine the best distance to strike moving prey. Their research revealed cuttlefish use stereopsis to perceive depth when hunting a moving target.

  • Underwater pile driving noise causes alarm...
    on December 16, 2019 at 9:14 pm

    Exposure to underwater pile driving noise, which can be associated with the construction of docks, piers, and offshore wind farms, causes squid to exhibit strong alarm behaviors, according to a study by Woods Hole Oceanographic Institution (WHOI) researchers published Dec. 16, 2019, in the journal Marine Pollution Bulletin.

  • There's a new squid in town
    on December 11, 2019 at 2:48 pm

    "Cephalopods were the first intelligent animals on the planet."

  • Squid pigments have antimicrobial properties
    on December 5, 2019 at 4:59 pm

    Ommochromes, the pigments that colour the skin of squids and other invertebrates, could be used in the food and health sectors for their antioxidant and antimicrobial properties. This is confirmed by analyses carried out by researchers from the University of Sonora in Mexico and the Miguel Hernández University in Spain.