Fish

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fish : any of numerous cold-blooded strictly aquatic craniate vertebrates that include the bony fishes and usually the cartilaginous and jawless fishes and that have typically an elongated somewhat spindle-shaped body terminating in a broad caudal (see caudal 2) fin, limbs in the form of fins when present at all, and a 2-chambered heart by which blood is sent through thoracic gills to be oxygenated — Merriam-Webster See also OneLook

Thesaurus

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

Encyclopedia

Fish are the gill-bearing aquatic craniate animals that lack limbs with digits. They form a sister group to the tunicates, together forming the olfactores. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish as well as various extinct related groups. Tetrapods emerged within lobe-finned fishes, so cladistically they are fish as well. However, traditionally fish are rendered paraphyletic by excluding the tetrapods (i.e., the amphibians, reptiles, birds and mammals which all descended from within the same ancestry). Because in this manner the term “fish” is defined negatively as a paraphyletic group, it is not considered a formal taxonomic grouping in systematic biology. The traditional term pisces (also ichthyes) is considered a typological, but not a phylogenetic classification. — Wikipedia

Fish (Encyclopædia Britannica)

Bony Vertebrates (One Zoom)

Agnatha (Catalogue of Life)
Chondrichthyes (Catalogue of Life)
Osteichthyes (Catalogue of Life)
Actinopterygii (Catalogue of Life)

Fish (WolframAlpha)

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Adventures

Explore related posts on Cosma …

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Cuttle Vision - Cuttlefish are odd creatures, so news stories about them tend to be interesting. However, a story about them that’s going a bit viral is downright amusing! As you can see from the image in this video from the Guardian, some scientists wanted to find out whether or not cuttlefish have stereoscopic vision (like humans do), … Continue reading Cuttle Vision

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Inspiration

Among a Thousand Fish: Diving with Caranx (Air Pano, YouTube 360° Video)

Tropical Fish Cam (Aquarium of the Pacific in Long Beach, California, Explore.org)

Talks about Fish (TED: Ideas Worth Spreading)
Articles about Fish (Big Think)

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Innovation

Science

Ichthyology, also called fish science, is the branch of zoology devoted to the study of fish, including jawless fish (Agnatha), cartilaginous fish (Chondrichthyes) and bony fish (Osteichthyes). According to FishBase, 33,400 species of fish had been described as of October 2016, with approximately 250 new species described each year. — Wikipedia

Ichthyology (Encyclopædia Britannica)

FishBase (R. Froese & D. Pauly)
Eschmeyer’s Catalog of Fishes (California Academy of Sciences)

Discover Fishes (Florida Museum of Natural History)

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Preservation

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Participation

Education

Fish (Science Trek)
Here Fishy Fishy (Biology4Kids)

Fascinating Fish (OLogy, American Museum of Natural History)

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

Community

Occupation

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

Organization

American Society of Ichthyologists and Herpetologists
Zoological Association of America
Association of Zoos and Aquariums

News

Ichthyology & Herpetology (American Society of Ichthyologists and Herpetologists)
Fish (EurekaAlert, American Association for the Advancement of Science)
Fish (bioRxiv: Preprint Server for Biology, Cold Spring Harbor Laboratory)
Fish (JSTOR)
Fish (Science Daily)
Fish (Science News)
Fish (Phys.org)
Fish (NPR Archives)

Government

Fish & Sharks (Northeast Fisheries Science Center, NOAA Fisheries)

More News …

Fish News -- ScienceDaily All about fish. Current research in marine biology including fish habitats, aquaculture, speciation, deep sea fish and more.

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Scientists uncover the 2.3-billion-year-old...
on October 12, 2026 at 9:27 pm
Scientists may have solved a 2.3-billion-year-old mystery about how Earth maintained enough oxygen to support life. Ancient rocks reveal that phosphorus recycling in the oceans created a self-sustaining cycle that helped keep oxygen levels high, even as the planet underwent dramatic environmental changes. The discovery challenges assumptions about Earth's early atmosphere and raises new questions about why complex life took so long to emerge.
This “golden tree” coral was too strange for...
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Scientists changed how zoo lions eat. Their wild...
on October 7, 2026 at 12:46 pm
Giving zoo lions whole carcasses on a feast-and-fast schedule appears to bring out more natural behavior. The lions spent nearly three times longer feeding, engaged in more tearing and manipulating of food, and rested more heavily after meals. Their activity then increased gradually during the fasting period, closely resembling the rhythm seen in wild lions.
Sharks can hear nearly 250 feet away and pinpoint...
on September 30, 2026 at 3:58 am
Wild blacktip sharks can detect low-frequency sounds from nearly 250 feet away, according to experiments conducted off the Florida coast. The sharks not only heard the sounds but sharply changed direction away from them, suggesting they could pinpoint where they were coming from.

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.

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