Cosma / Communication / Knowledge / Realm / Terrestrial / Life / Animal / Invertebrate / Cephalopod


Deep Sea Creatures (Leo Richards, Natural World Facts, YouTube Playlist)
Deep Sea Hub (Leo Richards, Natural World Facts, Official Website)


cephalopod : any of a class (Cephalopoda) of marine mollusks including the squids, cuttlefishes, and octopuses that move by expelling water from a tubular siphon under the head and that have a group of muscular usually sucker-bearing arms around the front of the head, highly developed eyes, and usually a sac containing ink which is ejected for defense or concealment — Merriam-Webster   See also   OneLook


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


Cephalopod is any member of the molluscan class Cephalopoda such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral body symmetry, a prominent head, and a set of arms or tentacles (muscular hydrostats) modified from the primitive molluscan foot. Fishers sometimes call cephalopods “inkfish”, referring to their common ability to squirt ink. Cephalopods became dominant during the Ordovician period, represented by primitive nautiloids. The class now contains two, only distantly related, extant subclasses: Coleoidea, which includes octopuses, squid, and cuttlefish; and Nautiloidea, represented by Nautilus and Allonautilus. In the Coleoidea, the molluscan shell has been internalized or is absent, whereas in the Nautiloidea, the external shell remains. — Wikipedia

Cephalopod (Encyclopædia Britannica)

Cephalopods (One Zoom)
Cephalopoda (Catalogue of Life)
Cephalopod (WolframAlpha)



Talks about Cephalopods (TED: Ideas Worth Spreading)
Articles about Cephalopods (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: 594.5 Cephalopods (Library Thing)
Subject: Cephalopod (Library Thing)

Subject: Cephalopod (Open Library)

LCC: QL 430 Cephalopods (UPenn Online Books)
Subject: Cephalopod (UPenn Online Books)

LCC: QL 430 Cephalopods (Library of Congress)
Subject: Cephalopod (Library of Congress)

Subject: Cephalopod (WorldCat)




Octopi & 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


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



Cephalopod (USA.gov)


Here are links to pages about closely related subjects.

Knowledge Realm

Terrestrial   (Earth)

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Microorganism Virus
Prokaryote Archaea, Bacteria
Eukaryote Protist, Fungi, Algae, Protozoa (Tardigrade)
Plant Flower, Tree
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Cephalopod Cuttlefish, Octopus
Crustacean Lobster, Shrimp
Arachnid Spider, Scorpion
Insect Ant, Bee, Beetle, Butterfly
Fish Seahorse, Ray, Shark
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Primate Monkey, Chimpanzee, Human


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