HISTORY OF FISH slant are a paraphyletic free radical of organisms that lie in of all gill-bearing aquatic vertebrate (or craniate) animals that pretermit limbs with digits. Included in this definition are the living hagfish, lampreys, and gristly and bony fish, as well as various out(p) related groups. around fish are ect other(a)mic ( insentient), allowing their body temperatures to straggle as ambient temperatures change, though several(prenominal) of the large vigorous swimmers like white shark and tuna fish stand devote a exalteder core temperature. fish are exuberant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams (e.g., melanise and gudgeon) to the abyssal and even heal depths of the deepest oceanics (e.g., gulpers and anglerfish). At 32,000 species, fish establish greater species diversity than any other class of vertebrates. Fish, particularly as food, are an important pick worldwide. Commercial an d subsistence fishers bleed fish in wild fisheries (see fishing) or farm them in ponds or in cages in the ocean (see aquaculture). They are similarly caught by recreational fishers, kept as pets, raised by fish keepers, and exhibited in public aquaria. Fish have had a role in culture done the ages, serving as deities, religious symbols, and as the subjects of art, books and movies. Because the term fish is defined negatively, and excludes the tetrapods (i.e., the amphibians, reptiles, birds and mammals) which descend from within the same ancestry, it is paraphyletic, and is non considered a appropriate grouping in systematic biology. The handed-down term Pisces (also ichthyic) is considered a typological, but not a phyletic classification. The earliest organisms that can be classified as fish were soft-bodied chordates that first appeared during the Welsh period. Although they lacked a true spine, they possessed notochords which allowed them to be more flying than their inv ertebrate counterparts. Fish would continue ! to create mentally through the Paleozoic...If you expect to get a full essay, ball club it on our website: OrderCustomPaper.com
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