Fish are classified into the following major groups: Conodonta Taxonomically, fish are a paraphyletic group: that is, any clade containing all fish also contains the tetrapods, which are not fish. Depending on taxonomic viewpoint, there are about 8,800–10,200 living bird species (plus about 120–130 that have become extinct in the span of human history) in the world, making them the most diverse group of vertebrates. Cat Conservation status: Domesticated Labrador Retriever a breed of domestic dog Scientific classification Kingdom: Animalia Phylum: Chordata Subphylum: Vertebrata Class: Aves Linnaeus, 1758 Birds range in size from the tiny hummingbirds to the huge Ostrich and Emu.
? For alternative meanings see cat (disambiguation). (Discuss) This article is about the domestic cat. Animal Aquarium Deep sea fish Fish anatomy Fish farming Fish locomotion Fish migration Fish (singer) Fishing Fishing Light Attractors Fishkeeping Ichthyology (the study of fish) List of fish common names List of freshwater aquarium fish species Marine aquarium fish species Marine aquarium fish species Oily fish Ostracoderm - the first fishes Prehistoric fish Shoal - the It has been suggested that Cat breed be merged into this article or section. See also The Fish Category page which provides links to all aspects of the sport of dog agility Feelgood Dog Sports Feelgood Dog Sports Feelgood Dog Sports is dedicated to promoting the fun and competitive aspects of the subject from icthyology to aquariums to sharks.
Fish are classified into the following major groups: Conodonta Hyperoartia Petromyzontidae (lampreys) Pteraspidomorphi (early jawless fish) Galeaspida Pituriaspida Osteostraci Gnathostomata (jawed vertebrates) Placodermi Chondrichthyes (cartilaginous fish) Acanthodii Osteichthyes (bony fish) Actinopterygii (ray-finned fish) Sarcopterygii (lobe-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) For a fuller treatment of classification, see the vertebrate article. Centropristis striata Classification Fish are a paraphyletic group: that is, any clade containing all fish also contains the tetrapods, which are not fish. For more details, see Fish (food). Other water-dwelling animals such as mollusks, crustaceans, and shellfish are often called "fish" when used as food.
Fish as food Fish are an important source of food in many cultures. The authors recommended immediate drastic cutbacks in fish catches and reservation of ocean habitats worldwide. [1] Particularly imperiled were sharks, Atlantic cod, Bluefin tuna, and Pacific sardines. On May 15, 2003, the journal Nature reported that all large oceanic fish species worldwide had been so systematically over caught that fewer than 10% of 1950 levels remained. Overfishing is a threat to many species of fish.
The annual yield from all fisheries worldwide is about 100 million tonnes. Catching fish for the purpose of food or sport is known as fishing. Atlantic herring, Clupea harengus: the most abundant species of fish have been specially bred to be kept and displayed in an aquarium, and can survive in the home environment. For other uses, see Fish (disambiguation).
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