Tree of Life
Plant Flower, Tree
Invertebrate 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
These are organized by a classification scheme developed exclusively for Cosma. More…
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
How to set up freshwater aquariums (Drs. Foster & Smith Educational Staff)
Aquarium Calculators (Calculator.com)
Beginner to Aquarium Fish Keeping (Sam Hirte-Runtsch, Aquarium Fish Magazine)
Fish Link Central
Fish News -- ScienceDaily All about fish. Current research in marine biology including fish habitats, aquaculture, speciation, deep sea fish and more.
- Tire-related chemical is largely responsible for...on December 3, 2020 at 7:42 pm
Scientists have discovered a chemical that kills coho salmon in urban streams before the fish can spawn.
- What social distancing does to a fish brainon December 3, 2020 at 12:27 am
Researchers have discovered a brain molecule that functions as a 'thermometer' for the presence of others in an animal's environment. Zebrafish 'feel' the presence of others via mechanosensation and water movements -- which turns the brain hormone on.
- Octogenarian snapper found off Australia becomes...on December 1, 2020 at 5:41 pm
An 81-year-old midnight snapper caught off the coast of Western Australia has taken the title of the oldest tropical reef fish recorded anywhere in the world. The octogenarian fish was found at the Rowley Shoals -- about 300km west of Broome -- and was part of a study that has revised what we know about the longevity of tropical fish.
- Caribbean coral reefs under siege from aggressive...on November 30, 2020 at 6:14 pm
Human activity endangers coral health around the world. A new algal threat is taking advantage of coral's already precarious situation in the Caribbean and making it even harder for reef ecosystems to grow. Just-published research details how an aggressive, golden-brown, crust-like alga is rapidly overgrowing shallow reefs, taking the place of coral that was damaged by extreme storms and exacerbating the damage caused by ocean acidification, disease, pollution, and bleaching.
- Study of threatened desert tortoises offers new...on November 27, 2020 at 1:54 pm
A new study supports a new conservation strategy. Climate change increasingly makes relocating threatened species necessary, despite the frequently low success rate. The study found tortoises with lots of genetic variation were much more likely to survive after their relocation. The research supports this fast, inexpensive conservation tool, and upends the conventional wisdom suggesting that tortoises from areas moved from close by would fare best.
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.
- How will sharks respond to climate change? It...on November 27, 2020 at 12:30 pm
They may have been around for hundreds of millions of years—long before trees—but today sharks and rays are are among the most threatened animals in the world, largely because of overfishing and habitat loss.
- New research shows even small ships pose deadly...on November 27, 2020 at 11:41 am
It has long been known that ship strikes involving large vessels pose one of the greatest threats to North Atlantic right whales, whose coastal habitats and tendency to stay close to the water's surface make them vulnerable to such deadly collisions.
- Time for total rethink on the management of alien...on November 27, 2020 at 11:36 am
Non-indigenous or alien species need to be appreciated for their potential benefits and not just the negative impacts they can have on the environment, according to new research.
- Study of threatened desert tortoises offers new...on November 26, 2020 at 7:00 pm
In Nevada's dry Ivanpah Valley, just southeast of Las Vegas, a massive unintended experiment in animal conservation has revealed an unexpected result.
- New migration maps serve as tools to help big...on November 26, 2020 at 5:22 pm
The life-or-death journey made by mule deer during the second-longest big game migration in North America came down to their ability to squeeze through a fence—a discovery made by scientists using wildlife GPS tracking techniques to map animal migrations in the West in unprecedented detail.