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 See also OneLook
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
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- Citizen science-led expedition retraces the...on November 18, 2022 at 5:51 pm
Biologist Eduardo Sampaio researched octopuses off Cape Verde. He participated in a Citizen Science-led expedition that retraced the journey of Charles Darwin.
- Ask the experts: The world's population just hit...on November 17, 2022 at 6:18 pm
On November 15, the world's population surpassed 8 billion people—or at least, it very likely did as global population is an estimate. That's 2 billion more people on Earth than in 1999 when the population hit 6 million and 4 billion more than in 1974.
- How squid and octopus get their big brainson November 9, 2022 at 9:13 pm
Cephalopods—which include octopus, squid, and their cuttlefish cousins—are capable of some truly charismatic behaviors. They can quickly process information to transform shape, color, and even texture, blending in with their surroundings. They can also communicate, show signs of spatial learning, and use tools to solve problems. They're so smart, they can even get bored.
- Octopuses caught on video throwing silt and...on November 9, 2022 at 7:00 pm
Octopuses appear to deliberately throw debris, sometimes directed at other octopuses, according to a study publishing Nov. 9 in the open-access journal PLOS ONE led by Peter Godfrey-Smith at the University of Sydney and colleagues.
- Hunt for deep sea minerals draws scrutiny amid...on November 2, 2022 at 4:10 pm
High demand for metals ranging from copper to cobalt is pushing the mining industry to explore the world's deepest oceans, a troubling development for scientists who warn that extracting minerals from critical ecosystems that help regulate climate could cause irreparable damage.
Here are links to pages about closely related subjects.
Tree of Life
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