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Fish are aquatic vertebrates that are typically cold-blooded; covered with scales, and equipped with two sets of paired fins and several unpaired fins. Fish are abundant in the sea and in freshwaters, with species being known from mountain streams (e.g., char and gudgeon) as well as in the deepest depths of the ocean (e.g., gulpers and anglerfish). They are of tremendous importance as food for people around the world, being either collected from the wild (see fishing) or being farmed in much the same way as cattle or chickens (see aquaculture). Fish are also exploited for recreation, through angling and fishkeeping, and fish are commonly exhibited in public aquaria. Through the ages, many cultures have featured fish in their legends and myths, from the "great fish" that swallowed Jonah the Prophet through to the ever-popular half-human, half-fish mermaid. More about fish... Fish anatomy is primarily governed by the physical characteristics of water, which is much denser than air, holds a relatively small amount of dissolved oxygen, and absorbs light more than air does. Fish have a variety of different body plans. Their body is divided into head, trunk, and tail, although the dividing points are not always externally visible. The body is often fusiform, a streamlined body plan often found in fast-moving fish. They may also be filiform (eel-shaped) or vermiform (worm-shaped). Also, fish are often either laterally compressed (thin) or vertically depressed (flat). Seen in this picture are (1) - operculum (gill cover), (2) - lateral line, (3) - dorsal fin, (4) - adipose fin, (5) - caudal peduncle, (6) - caudal fin, (7) - anal fin, (8) - photophores, (9) - pelvic fins (paired), (10) - pectoral fins (paired). The weather loaches or weatherfishes of the genus Misgurnus is a genus of loaches in Asia and Europe. They receive their common name from the ability to detect changes in barometric pressure and react with frantic swimming or standing on end. This is because before a storm the barometric pressure changes, and this is known to make these fish more active. The dojo loach, or Misgurnus anguillicaudatus, an Asian weather loach species, is a common aquarium and food fish. Like many other loaches, they are slender and eel-like. They can vary in color from yellow to olive green, to a common light brown or gray with lighter undersides. The mouth of the loach is surrounded by three sets of barbels. It uses them to sift through silt or pebbles to find food. It also uses them to dig under gravel and sand to conceal itself out of nervousness or defense unlike the other loaches who use the spines beneath the eyes. Salmon fry hatching (Salmo salar) - the larva has grown around the remains of the yolk - visible are the arteries spinning around the yolk and little oildrops, also the gut, the spine, the main caudal blood vessel, the bladder and the arcs of the gills. ...that the Loricariidae or the suckermouth catfish from Central and South America is the largest family of catfish, with almost 700 species and new species being described each year? ...that the king of herrings (Regalecus glesne), an oarfish of the family Regalecidae, is the world's longest bony fish with a length of 41 feet (12 m)? ...that the yoyo loach (Botia almorhae) from India and Pakistan is named for their black and white patterns, which often can be seen to spell "yoyo" especially in younger specimens? ...that studies of the inshore marine fish small-scale whiting (Sillago parvisquamis) suggest the female starts life smaller than the male, but grows faster and is larger than the male within two years? ... that the cream-spotted cardinalfish is the sole member of the new genus Ozichthys? Template:/box-header The Fish Quiz is a friendly quiz competition designed to test your general knowledge of fish. The current game is Fish Quiz Tournament X. You can read more and join the game here. Template:/box-footer "We eat fish and fish eat us." ---Dana Scully from The X-Files Fish • Edible fish • Extinct fish • Individual fish • Fictional fish • Fish by region • Fish common names • Fish diseases • Fisheries science • Fishing • Fishkeeping • Ichthyology • Mythical fish • Venomous fish • Freshwater fish List of fish common names List of fish families List of freshwater aquarium fish species List of marine aquarium fish species For more lists, please see here Template:/box-footer WikiProject Fishes WikiProject Aquarium Fishes WikiProject Sharks WikiProject Fishing Template:/box-header The Mini Edition of the Fish Portal is available for you to use on your wikipedia user page or talk page. It uses minimum space but retains many crucial features of the portal. To use it, place {{Portal:Fish/Mini portal}} on the designated page. See here for an example of the mini portal on a user page. Template:/box-footer Ichthyology : Fish anatomy, Fish development, Fish diseases, Fish locomotion, Fish migration, Ichthyology terms, Limnology, Marine biology, Meristics, Oceanography, Spawning Taxa : Chondrichthyes, Osteichthyes, Actinopterygii, Sarcopterygii, Chondrostei, Neopterygii, Holostei, Teleostei, Osteoglossomorpha, Elopomorpha, Clupeomorpha, Ostariophysi, Cyclosquamata, Scopelomorpha, Lampridiomorpha, Polymyxiomorpha, Paracanthopterygii, Acanthopterygii Fishery : Angling, Aquaculture, Fishing, Fish as food, Fish farming, Fish market, Fisheries management, Fishing industry, Overfishing Food fish : Anchovy, Barb, Basa fish, Bass, Carp, Catfish, Cod, Eel, Flatfish, Goby, Gourami, Haddock, Herring, Mackerel, Oily fish, Perch, Pollock, Salmon, Snapper, Snakehead, Sturgeon, Tilapia, Trout, Tuna, Whitefish Fishkeeping : Aeration, Aquarium, Fish food, Marine aquarium, Reef aquarium, Brackish water aquarium Ornamental fish : Angelfish(freshwater), Angelfish(marine), Barb, Blenny, Boxfish, Butterflyfish, Cichlid, Chromis, Clownfish, Corydoras, Damsel, Danio, Discus, Goby, Goldfish, Gourami, Koi, Lionfish, Live-bearer, Loach, Mbuna, Rainbowfish, Pufferfish, Rasbora, Seahorse, Siamese fighting fish, Suckermouth catfish, Tang, Tetra, Triggerfish, Wrasse Others : Amphibious fish, Electric fish, Deep sea fish, Ichthys, Mermaid, Prehistoric fish, Ray, Shark, Walking fish Template:/box-header {{Wikipedia:WikiProject Fishes/to do}} Template:/box-footer Biology Fishing Marine Life Sharks

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