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octopus : genus (Octopus) of cephalopod mollusks that have eight muscular arms equipped with two rows of suckers; broadly : any octopod excepting the paper nautilus — Merriam-Webster   See also   OneLook


Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords


Octopus is a soft-bodied, eight-armed mollusc of the order Octopoda. Around 300 species are recognized and the order is grouped within the class Cephalopoda with squids, cuttlefish and nautiloids. Like other cephalopods, the octopus is bilaterally symmetric with two eyes and a beak, with its mouth at the centre point of the arms (which are sometimes mistakenly called “tentacles”). The soft body can rapidly alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight arms behind them as they swim. The siphon is used both for respiration and for locomotion, by expelling a jet of water. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviorally diverse of all invertebrates. — Wikipedia

Octopus (Encyclopædia Britannica)

Octopods (One Zoom)
Octopus (Catalogue of Life)
Octopus (WolframAlpha)



Talks about Octopus (TED: Ideas Worth Spreading)
Articles about Octopus (Big Think)




Teuthology is the study of cephalopods such as octopus, squid, and cuttlefish. It is a branch of malacology, the study of molluscs, in marine zoology. — Wikipedia




DDC: 594.56 Octopus (Library Thing)
Subject: Octopus (Library Thing)

Subject: Octopus (Open Library)

LCC: QL 430.3 Octopus (UPenn Online Books)
Subject: Octopus (UPenn Online Books)

LCC: QL 430.3 Octopus (Library of Congress)
Subject: Octopus (Library of Congress)

Subject: Octopus (WorldCat)




Octopus and Squid (Biology4Kids)

MERLOT: Multimedia Educational Resource for Learning and Online Teaching
OER Commons: Open Educational Resources



Zoologists and Wildlife Biologists (CareerOneStop, U.S. Department of Labor, Employment and Training Administration)
Zoologists and Wildlife Biologists (Occupational Outlook Handbook, U.S. Bureau of Labor Statistics)
Zoo Careers (SeaWorld Parks & Entertainment)


Zoological Association of America
Association of Zoos and Aquariums


Octopus (EurekaAlert, American Association for the Advancement of Science)
Octopus (bioRxiv: Preprint Server for Biology, Cold Spring Harbor Laboratory)
Octopus (JSTOR)
Octopus (Science Daily)
Octopus (Science News)
Octopus (Phys.org)
Octopus (NPR Archives)



Octopus (USA.gov)


More News …

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.

  • Novel filter uses carbon nanotubes to create new...
    on September 21, 2023 at 2:25 pm

    A collaborative team has developed a new type of filter for kidney dialysis machines that can clean the blood more efficiently and improve patient care. Piran Kidambi, assistant professor of chemical and biomolecular engineering, led the team, which included William Fissell, associate professor of nephrology and hypertension at Vanderbilt University Medical Center, Shuvo Roy, professor of bioengineering at University of California, San Francisco, and Francesco Fornasiero, biosciences and […]

  • Unveiling the aquatic marvel: The rock-climbing...
    on September 20, 2023 at 8:58 pm

    Underwater "traffic" encompasses a fascinating variety of creatures, from fish with their graceful swimming postures to jet-propelled jellyfish and remoras hitching rides on other organisms. Among these, a remarkable species known as the "underwater gecko," the rock-climbing fish (Beaufortia kweichowensis), stands out. This extraordinary creature possesses a unique set of abilities—it can swiftly slide along underwater surfaces like an ice skater, crawl against water currents, and securely […]

  • Are crows really that clever?
    on September 14, 2023 at 3:30 pm

    It's no secret corvids are endowed with remarkable cognitive abilities.

  • How to make color-changing 'Transformers' with...
    on September 8, 2023 at 4:58 pm

    Shape and color changing are key survival traits for many animals. Chameleons can change their body to hide from predators, to reflect their moods, or even to defend their territory, while some soft-bodied animal-like octopuses, squids, and cuttlefish can change both their color and shape to signal or camouflage.

  • Just off California, octopuses are converging by...
    on August 30, 2023 at 7:00 pm

    It was the last hour of a 30-hour dive, nearly two murky miles below the ocean's surface.


Here are links to pages about closely related subjects.

Knowledge Realm

Terrestrial   (Earth)

Sphere Land, Ice, Water (Ocean), Air, Life (Cell, Gene)
Ecosystem Forest, Grassland, Desert, Arctic, Aquatic

Tree of Life
Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
Cnidaria Coral, Jellyfish
Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Fish Seahorse, Ray, Shark
Amphibian Frog, Salamander
Reptile Turtle, Tortoise, Dinosaur
Bird Penguin, Ostrich, Owl, Crow, Parrot
Mammal Platypus, Bat, Mouse, Rabbit, Goat, Giraffe, Camel, Horse, Elephant, Mammoth
Walrus, Seal, Polar Bear, Bear, Panda, Cat, Tiger, Lion, Dog, Wolf
Cetacean Whale, Dolphin
Primate Monkey, Chimpanzee, Human


1.   The resources on this page are are organized by a classification scheme developed exclusively for Cosma.