Cosma Home > Communication > Knowledge > Realm > Terrestrial > Sphere > Life > Animal > Octopus


Giant Pacific Otopus (National Geographic)



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

Tree of Life
Plant Flower, Tree
Invertebrate Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human


These are organized by a classification scheme developed exclusively for Cosma. More…



The Octopus News Magazine Online


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

octopuses or octopi (Merriam-Webster)
OneLook, Free Dictionary, Wiktionary, Urban Dictionary


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

Encyclopædia Britannica


Octopus Facts (Alina Bradford, Live Science)
Ten Curious Facts About Octopuses (Rachel Nuwer, Smithsonian.com)
Octopus Facts (Alina Bradford, Live Science)




On Ecstasy, Octopuses Reached Out for a Hug (JoAnna Klein, New York Times)



Fossil Octopuses (The Octopus News Magazine Online)


WorldCat, Library of Congress, UPenn Online Books, Open Library



Why the octopus brain is so extraordinary (Cláudio L. Guerra, TED-Ed)

Octopus and Squid (Biology4Kids)


OER Commons: Open Educational Resources


The Octopus News Magazine Online, Phys.org, NPR Archives









A Brief History Of Octopi Taking Over The World (Kelsey D. Atherton, Popular Science)
Octopus Jokes (Worst Jokes Ever)


OEDILF: The Omnificent English Dictionary In Limerick Form


Song Lyrics


Giant Squid & Octopus: History and Evidence (Anomalies)
4 Cephalopods from Myth and Folklore: Celebrating World Octopus (Kattyayani’s Blog)



The Octopus News Magazine Online TONMO.com: Your Cephalopod Information Center (Octopus, Squid, Cuttlefish, Nautilus, Fossils)

  • Hello I am new around here
    by invalid@example.com (timothytyler113) on April 26, 2019 at 2:44 am

    So I hello every one. I am new around here. I have joined in hope of getting help Identifying this Octopus. It appears to be a Dwarf Species. Mantle length of maybe 1.5 in. TL about 6-7 in. Nocturnal. Originally thought it to be a Merc. But it is from the Pacific. Thought Degueti. But colour and proportions do not match exactly. Any help would be very Appreciated Thank You […]

  • NEW MEMBER name is anthony 25 years young im in...
    by invalid@example.com (anthonyd106) on April 26, 2019 at 12:39 am

    hello guys happy to be apart of the community […]

  • East Asian Octopuses x2
    by invalid@example.com (davelin315) on April 24, 2019 at 10:27 pm

    I received 2 small octopuses from “East Asia” and am wondering if anyone can be of help with ID. FWIW, the wholesaler also had Wunderpus photogenicus listed as being from East Asia as well. Both are smaller specimens but have a different look, albeit they were photographed either in the bag (or crawling out of it) or newly introduced into holding tanks. Both are small, abdomen at rest is about the size of the last digit on my pinky. Much bigger than the last O. joubini I had, […]

    by invalid@example.com (saintthomas) on April 24, 2019 at 9:55 am

    To all cephalopod lovers, We are currently producing a film on cephalopod predatory and reproductive behavior for NATIONAL GEOGRAPHIC CHANNELS and several European broadcasters, including NDR, ARTE, SVT. We have been so far filming spectacular predations offshore Brazil and in the Philippines ( see NEWS : ALIENS OF THE DEEP...SMALL IS BEAUTIFULL and click on the image to launch the video). We are now looking for: - little known predatory or courtship behavior, - interesting black water dives, […]

  • Dosidicus gigas (Humboldt/Jumbo Squid)
    by invalid@example.com (GPO87) on April 23, 2019 at 10:08 pm

    A squid that hardly needs introduction, Dosidicus gigas (aka. the Humboldt Squid aka. jumbo squid aka diablo rojo, is the only member of the genus Dosidicus. The Humbolt is well know for its aggresive attitude, as well as a behavior known as "flashing". Flashing is a sudden change in color between red and white skin tones, by the quick contraction of chromatophores. The range of Humbolt Squid were commonly thought to exist primarily in the tropical Pacific. However, in recent years, that […]

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.

  • Squid team finds high species diversity off...
    on April 9, 2019 at 12:35 pm

    Squids and octopuses could be considered the "parrots of the ocean". Some are smart, and many have complex behaviours. And, of course, they have strange, bird-like beaks. […]

  • 4-D-printed materials can be stiff as wood or...
    on March 22, 2019 at 1:26 pm

    Imagine smart materials that can morph from being stiff as wood to as soft as a sponge—and also change shape. […]

  • Robot arms with the flexibility of an elephant's...
    on March 19, 2019 at 11:43 am

    Unlike conventional robot arms with hinged and swivel joints, new flexible arms being developed by Professor Stefan Seelecke and his research group at Saarland University are constructed using muscles made from shape-memory wires that have the ability to bend in almost any direction and to wind themselves around corners. […]

  • Diving to new depths for Antarctic science
    on March 15, 2019 at 1:00 pm

    A University of Canterbury scientist is using Kiwi technology in her Antarctic research to capture fascinating footage of life beneath the surface in McMurdo Sound. […]

  • The secret of a squid's ability to change colors...
    on March 6, 2019 at 11:36 am

    In the blink of an eye, squid can change from sandy brown to vibrant red or ripple with bright metallic rainbows. Their color-changing abilities (and those of their fellow cephalopods, octopus and cuttlefish) are more sophisticated than any found in the animal kingdom. […]