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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 — Webster
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
Ichthyology, also known as fish science, is the branch of zoology devoted to the study of fish. This includes bony fish (Osteichthyes), cartilaginous fish (Chondrichthyes), and jawless fish (Agnatha). While a large number of species have been discovered, approximately 250 new species are officially described by science each year. According to FishBase, 33,400 species of fish had been described by October 2016. — Wikipedia
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Fish Link Central
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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Coral reef fish breed more successfully if motorboat noise is reduced, new research shows.
- Two pathogens linked to salmon health and survivalon May 20, 2022 at 12:45 am
Many wild salmon populations in B.C. have experienced substantial declines over the last three decades. New research can help chart a course towards better protection of wild salmon.
- Scallops swim into illuminated fishing potson May 18, 2022 at 2:18 pm
Scallops are drawn to illuminated fishing pots like moths to a flame. The study examined the effect of LED lights on crab and lobster pots used by fishing boats off the coast of Cornwall, UK, and the research team was stunned by the results. More than 500 scallops were caught -- 99.6% of them in pots with lights.
- At-risk sea life in the Atlantic needs better...on May 18, 2022 at 2:18 pm
New research has shown a dramatic increase in shipping in the North East Atlantic. Scientists now warn that more monitoring in the area is required to help protect sea life on the at-risk register.
- Amazon deforestation threatens newly discovered...on May 16, 2022 at 4:39 pm
Researchers have discovered and described two new species of Amazonian fish -- one with striking red-orange fins and the other so small it is technically considered a miniature fish species. Both species inhabit waters located at the bleeding edge of human encroachment into the Amazon rainforest roughly 25 miles north of the Brazilian city of Apuí. The study's authors said that ongoing deforestation in the region places these roughly inch-long fish, part of a group known colloquially as the […]
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.
- Nearly 8,000-year-old skull found in Minnesota...on May 22, 2022 at 6:44 am
A partial skull that was discovered last summer by two kayakers in Minnesota will be returned to Native American officials after investigations determined it was about 8,000 years old.
- Millions stranded, dozens dead as flooding hits...on May 21, 2022 at 4:33 pm
Heavy rains have caused widespread flooding in parts of Bangladesh and India, leaving millions stranded and at least 57 dead, officials said Saturday.
- Wildlife officials truck Chinook salmon to cooler...on May 20, 2022 at 5:16 pm
In a stopgap measure to help struggling spring- and winter-run Chinook salmon spawn in the face of rising water temperatures and lower water levels due to climate change, state and federal wildlife officials in Northern California have begun trucking adult fish to cooler waters.
- Growing number of sick and dying California brown...on May 20, 2022 at 5:15 pm
Hundreds of sick and dying California brown pelicans have recently been found across the Southern California region and are now being treated at various rescue centers along the coast, officials said.
- IAP releases datasets of frequent marine...on May 20, 2022 at 5:11 pm
Heatwaves are extreme climatic events that occur in the atmosphere and even the oceans. Recent research indicates that marine heatwaves (MHWs) will become more frequent and intense under global warming conditions.
Here are links to pages about closely related subjects.
Life Cell, Gene, Tree of Life
Plant Flower, Tree
Invertebrate Cuttlefish, Octopus, Ant, Bee, Butterfly, Spider, Lobster
Vertebrate Fish, Seahorse, Ray, Shark, Frog, Turtle, Tortoise, Dinosaur
Bird, Ostrich, Owl, Crow, Parrot
Mammal Bat, Rabbit, Giraffe, Camel, Horse, Elephant, Mammoth
Whale, Dolphin, Walrus, Seal, Polar Bear, Bear, Cat, Tiger, Lion, Dog, Wolf
Monkey, Chimpanzee, Human