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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. — 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 (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.

  • How whale shark rhodopsin evolved to see, in the...
    on March 29, 2023 at 1:19 pm

    A group of researchers discovered that the rhodopsin -- a protein in the eye that detects light -- of whale sharks has changed to efficiently detect blue light, which penetrates deep-sea water easily. The amino acid substitutions -- one of which is counterintuitively associated with congenital stationary night blindness in humans -- aid in detecting the low levels of light in the deep-sea. Although these changes make the whale shark rhodopsin less thermally stable the deep-sea temperature, […]

  • Inbreeding contributes to decline of endangered...
    on March 20, 2023 at 6:37 pm

    The small size and isolation of the endangered population of Southern Resident killer whales in the Pacific Northwest have led to high levels of inbreeding. This inbreeding has contributed to their decline, which has continued as surrounding killer whale populations expand, according to new research.

  • Unraveling whale entanglement risk factors off...
    on March 20, 2023 at 6:37 pm

    New research is beginning to unravel the times of year and locations where whales are at greatest danger of entanglement in fishing gear on the Oregon Coast.

  • Minke whales are as small as a lunge-feeding...
    on March 13, 2023 at 4:09 pm

    A new study of Antarctic minke whales reveals a minimum size limit for whales employing the highly efficient 'lunge-feeding' strategy that enabled the blue whale to become the largest animal on Earth.

  • Toothed whales catch food in the deep using vocal...
    on March 3, 2023 at 3:53 pm

    Toothed whales, such as dolphins, killer whales and sperm whales communicate and catch food exclusively with sound. Now researchers have for the first time found they evolved a new sound source in their nose that is functionally the same as the human larynx. - 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.

  • New research using fossils of whale ancestors...
    on March 30, 2023 at 3:51 pm

    Modern cetaceans—whales and dolphins—have one of the largest size ranges of any living animal group, ranging from as small as 1.5 meters long to as much as 30. However, a new study reveals this diversity came much later in their evolution than expected.

  • Fishing line and plastic endangering young...
    on March 30, 2023 at 1:58 pm

    A leading Perth dolphin researcher is urging fishers to be extra vigilant with the proper disposal of fishing lines and hooks after seeing several of the marine mammals in Cockburn Sound caught up in discarded line. Dr. Delphine Chabanne, from Murdoch University's Harry Butler Institute, said she saw two young bottlenose dolphins within about eight months that had line wrapped tightly around their bodies. Others had been seen caught in line in previous years.

  • Mighty oceans and humble ponds play key roles in...
    on March 28, 2023 at 5:24 pm

    By monitoring oceans and peering into ponds, European projects seek to protect an array of animal and plant life.

  • Bangladesh bans plastics in world's largest...
    on March 28, 2023 at 2:02 pm

    Conservationists in Bangladesh said Tuesday that tourists dropping rubbish in the world's largest mangrove forest had seriously damaged the ecosystem, forcing the imposition of a single-use plastic ban in the World Heritage site.

  • Scientists uncover startling concentrations of...
    on March 24, 2023 at 6:03 pm

    First it was the eerie images of barrels leaking on the seafloor not far from Catalina Island. Then the shocking realization that the nation's largest manufacturer of DDT had once used the ocean as a huge dumping ground—and that as many as half a million barrels of its acid waste had been poured straight into the water.


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.