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How smart are dolphins? (Lori Marino, TED-Ed)
TED-Ed (YouTube Channel)


dolphin : any of various small marine toothed whales (family Delphinidae) with the snout more or less elongated into a beak and the neck vertebrae partially fused

Note: While not closely related, dolphins and porpoises share a physical resemblance that often leads to misidentification. Dolphins typically have cone-shaped teeth, curved dorsal fins, and elongated beaks with large mouths, while porpoises have flat, spade-shaped teeth, triangular dorsal fins, and shortened beaks with smaller mouths. — Merriam-Webster   See also   OneLook


Dolphins are a widely distributed and diverse group of aquatic mammals. They are an informal grouping within the order Cetacea, excluding whales and porpoises, so to zoologists the grouping is paraphyletic. The dolphins comprise the extant families Delphinidae (the oceanic dolphins), Platanistidae (the Indian river dolphins), Iniidae (the new world river dolphins), and Pontoporiidae (the brackish dolphins), and the extinct Lipotidae (baiji or Chinese river dolphin). There are 40 extant species of dolphins. Dolphins, alongside other cetaceans, belong to the clade Cetartiodactyla with even-toed ungulates. Their closest living relatives are the hippopotamuses, having diverged about 40 million years ago. — Wikipedia

Dolphin (Encyclopædia Britannica)

Cetacean Fact Sheets (American Cetacean Society)

Dolphins (One Zoom)
Dolphin (WolframAlpha)




Cetology is the branch of marine mammal science that studies the approximately eighty species of whales, dolphins, and porpoises in the scientific order Cetacea. — Wikipedia

Solidifying the Dolphin Family Tree (Devin Reese, Smithsonian Ocean)




DDC: 599.53 Dolphins (Library Thing)
Subject: Dolphins (Library Thing)

Subject: Dolphins (Open Library)

LCC: QL 737.C432 TERM (UPenn Online Books)
Subject: Dolphins (UPenn Online Books)

LCC: QL 737.C432 TERM (Library of Congress)
Subject: Dolphins (Library of Congress)

Subject: Dolphins (WorldCat)




Cetacean Curriculum (American Cetacean Society)

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



Cetologists , or those who practice cetology, seek to understand and explain cetacean evolution, distribution, morphology, behavior, community dynamics, and other topics. — Wikipedia

Careers in Mammalogy (American Society of Mammalogists)

Zoologists and Wildlife Biologists (CareerOneStop, U.S. Department of Labor, Employment and Training Administration)


American Cetacean Society

Society for Marine Mammalogy

American Society of Mammalogists
The Mammal Society


Marine Mammal Science (Society for Marine Mammalogy)

Mammal Review (The Mammal Society)
Journal of Mammalogy (American Society of Mammalogists)
Mammalian Species (American Society of Mammalogists)

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



Dolphin (


More News …

Dolphins and Whales News -- ScienceDaily Whales and dolphins. Whale songs, beaching, endangered status -- current research news on all cetaceans.

  • Mutation rates in whales are much higher than...
    on August 31, 2023 at 6:29 pm

    An international team of marine scientists has studied the DNA of family groups from four different whale species to estimate their mutation rates. Using the newly determined rates, the group found that the number of humpback whales in the North Atlantic before whaling was 86 percent lower than earlier studies suggested.

  • Microplastics found embedded in tissues of whales...
    on August 10, 2023 at 10:01 pm

    Microscopic plastic particles have been found in the fats and lungs of two-thirds of the marine mammals in a graduate student's study of ocean microplastics. The presence of polymer particles and fibers in these animals suggests that microplastics can travel out of the digestive tract and lodge in the tissues.

  • Gray whales feeding along the Pacific Northwest...
    on August 9, 2023 at 8:47 pm

    Gray whales that spend their summers feeding off the coast of Oregon are shorter than their counterparts who travel north to the Arctic for food, new research shows.

  • Whale-like filter-feeding discovered in...
    on August 8, 2023 at 3:09 pm

    A remarkable new fossil from China reveals for the first time that a group of reptiles were already using whale-like filter feeding 250 million years ago.

  • Elusive pygmy right whale is a homebody
    on July 31, 2023 at 3:07 pm

    The smallest member of the filter-feeding family is one of the only whale species not to embark on seasonal migrations, new research finds. - latest science and technology news stories internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Crowdfunding conservation: A Pacific island's...
    on September 23, 2023 at 7:54 am

    For a little under $150, you can now directly sponsor marine conservation across one square kilometer of the Pacific Ocean, through a novel scheme announced this week by the tiny island of Niue.

  • Ashes of orca Tokitae finally home after her...
    on September 22, 2023 at 6:10 pm

    Tokitae the orca has come home.

  • Dolphins, seals and whales managed by the US are...
    on September 20, 2023 at 6:00 pm

    According to a study published in PLOS ONE, 72% of cetacean and pinniped stocks managed under U.S. jurisdiction are highly or very highly vulnerable to climate change. The research was led by Matthew D. Lettrich at NOAA Fisheries, in Silver Spring, Maryland, USA.

  • Study finds human-driven mass extinction is...
    on September 18, 2023 at 7:00 pm

    The passenger pigeon. The Tasmanian tiger. The Baiji, or Yangtze river dolphin. These rank among the best-known recent victims of what many scientists have declared the sixth mass extinction, as human actions are wiping out vertebrate animal species hundreds of times faster than they would otherwise disappear.

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

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


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.