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Fish

A fish is a poikilothermic (cold-blooded) water-dwelling vertebrate with gills. There are over 27,000 species of fish, making them the most diverse group of vertebrates. Taxonomically, fish are a paraphyletic group whose exact relationships are much debated; a common division is into the jawless fish (class Agnatha, 75 species including lampreys and hagfish), the cartilaginous fish (class Chondrichthyes, 800 species including sharks and rays), with the remainder classed as bony fish (class Osteichthyes). more...

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Fish come in different sizes, from the 14m (45 ft) whale shark to a 7 mm (just over 1/4 of an inch) long stout infantfish. Many types of aquatic animals named "fish", such as jellyfish and cuttlefish, are not true fish. Other sea dwelling creatures, like dolphins, are actually mammals.

Certain species of fish maintain elevated body temperatures to varying degrees. Endothermic teleosts (bony fishes) are all in the suborder Scombroidei and include the billfishes, tunas, and one species of "primitive" mackerel (Gasterochisma melampus). All sharks in the family Lamnidae – shortfin mako, long fin mako, white, porbeagle, and salmon shark – are known to have the capacity for endothermy, and evidence suggests the trait exists in family Alopiidae (thresher sharks). The degree of endothermy varies from the billfish, which warm only their eyes and brain, to bluefin tuna and porbeagle sharks who maintain body temperatures elevated in excess of 20 °C above ambient water temperatures. See also gigantothermy. Endothermy, though metabolically costly, is thought to provide advantages such as increased contractile force of muscles, higher rates of central nervous system processing, and higher rates of digestion.

Fish ecology

Fish can be found in almost all large bodies of water in salt or brackish or fresh water, at depths from just below the surface to several thousand meters. However, hyper-saline lakes like the Great Salt Lake do not support fishes. Some species of fish have been specially bred to be kept and displayed in an aquarium, and can survive in the home environment.

Catching fish for the purpose of food or sport is known as fishing. The annual yield from all fisheries worldwide is about 100 million tonnes. Overfishing is a threat to many species of fish. 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. Particularly imperiled were sharks, Atlantic cod, Bluefin tuna, and Pacific sardines. The authors recommended immediate drastic cutbacks in fish catches and reservation of ocean habitats worldwide.

Note on usage: "fish" vs. "fishes"

"Fishes" is the proper English plural form of "fish" that biologists use when speaking about two or more fish species, as in "There are over 25,000 fishes in the world" (meaning that there are over 25,000 fish species in the world). When speaking of two or more individual fish organisms, then the word "fish" is used, as in "There are several million fish of the species Gadus morhua" (meaning that G. morhua comprises several million individuals). To see both in action, consider the statement "There are twelve fish in this aquarium, representing five fishes" (meaning that the aquarium contains twelve individuals, some of the same species and some of different species, for a total of five species). The usage of the two words is similar to that of the words "people" and "peoples".

Fish as food

Fishes are an important source of food in many cultures. Other water-dwelling animals such as mollusks, crustaceans, and shellfish are often called "fish" when used as food. For more details, see Fish (food).

Read more at Wikipedia.org


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Rebel Jointed Minnow Silver Blue Crankbait Fishing LureRebel Jointed Minnow Silver Blue Crankbait Fishing Lure $1.99 Bill Lewis Rat-L-Trap Blood Line Shad 1/2 oz Lipless Crankbait Fishing LureBill Lewis Rat-L-Trap Blood Line Shad 1/2 oz Lipless Crankbait Fishing Lure $1.99
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Heddon Punkinseed 1St Quality 9630 Xywbr-Yellow & Black ShoreHeddon Punkinseed 1St Quality 9630 Xywbr-Yellow & Black Shore $8.50 New Berkley 4In Mini Schooling Rig "Bmnsr-Smlt 1302581"New Berkley 4In Mini Schooling Rig "Bmnsr-Smlt 1302581" $3.29
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1 Jb Lures Cyration Cy27 2 Hook Spinner Rig Crawler Harness Size 3.5 Red Nip1 Jb Lures Cyration Cy27 2 Hook Spinner Rig Crawler Harness Size 3.5 Red Nip $2.99 Wild Alaskan Salmon Fish Oil Omega 3 & 6 for Dogs and Cats Anti Itch Skin & CoatWild Alaskan Salmon Fish Oil Omega 3 & 6 for Dogs and Cats Anti Itch Skin & Coat $45.59
Vintage Heddon Hep And Hildebrant Spinner Fishing LuresVintage Heddon Hep And Hildebrant Spinner Fishing Lures $9.99 Coy Ties Mens Neck Tie Navy Fish Lure PrintCoy Ties Mens Neck Tie Navy Fish Lure Print $13.19 Was:  Previous Price 00004000 $18.84
Vintage Columbia Men's Button Up Shirt Size Xxl 2Xl Woven Short Sleeve PocketVintage Columbia Men's Button Up Shirt Size Xxl 2Xl Woven Short Sleeve Pocket $20.14 Was:  Previous Price $28.77 Vintage Gladding Group Mde. in Hong Kong South Bend 630 Spinning ReelVintage Gladding Group Mde. in Hong Kong South Bend 630 Spinning Reel $12.99
6x small Albino Ansistrus standard fin- Tropical Freshwater Fish6x small Albino Ansistrus standard fin- Tropical Freshwater Fish $28.00 T3351 H Vintage Rebel Deep Wee R Naturalized Color Fishing LureT3351 H Vintage Rebel Deep Wee R Naturalized Color Fishing Lure $9.50
Luck-E-Strike Rick Clunn Square Bill Brown Pink Craw Crankbait Fishing LureLuck-E-Strike Rick Clunn Square Bill Brown Pink Craw Crankbait Fishing Lure $1.99 Luck-E-Strike Rick Clunn Classic Series 1 The Freak Cranbait Fishing LureLuck-E-Strike Rick Clunn Classic Series 1 The Freak Cranbait Fishing Lure $2.25
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Bucktail River Streamer Flies- Hand Tied - Walleye, White Bass, Salmon (268)Bucktail River Streamer Flies- Hand Tied - Walleye, White Bass, Salmon (268) $7.50 (Lot Of 2) Duel Hardcore Swimbait Noi-Z Jr 85F 7/8Oz R1175-Hgsn Gld Shinr Aw6102(Lot Of 2) Duel Hardcore Swimbait Noi-Z Jr 85F 7/8Oz R1175-Hgsn Gld Shinr Aw6102 $3.25
(Lot Of 6) Bass Pro Gamakatsu Pro Jig Round Heads 3/16Oz 3/0 Bprh-316-10 Aw5501(Lot Of 6) Bass Pro Gamakatsu Pro Jig Round Heads 3/16Oz 3/0 Bprh-316-10 Aw5501 $3.33 Mint Heddon Baby Zara Vintage Fishing Lure Lures Tackle Topwater Fish NiceMint Heddon Baby Zara Vintage Fishing Lure Lures Tackle Topwater Fish Nice $2.22
Mens Southern Tide Belt FishMens Southern Tide Belt Fish $15.00 (Lot Of 2) Duel Hardcore Swimbait Noi-Z 105F 1Oz R1174-Pfg Pond Fg Aw6207(Lot Of 2) Duel Hardcore Swimbait Noi-Z 105F 1Oz R1174-Pfg Pond Fg Aw6207 $5.58
(Lot Of 3) Berkley Pitbull 3.5 Crankbait Bhbpb3.5-Sgcr 1/4Oz Spring Craw I5108(Lot Of 3) Berkley Pitbull 3.5 Crankbait Bhbpb3.5-Sgcr 1/4Oz Spring Craw I5108 $5.58 Sterling Silver Ichthus Fish Cross Pendant Tiny Cz Early Christian Symbol FaithSterling Silver Ichthus Fish Cross Pendant Tiny Cz Early Christian Symbol Faith $12.99
1 - Berkley Gulp Alive 6" Bloodworm 13.1 oz.(Bloody)X511 - Berkley Gulp Alive 6" Bloodworm 13.1 oz.(Bloody)X51 $8.65 Jammin Salmon Fish Rub. Amazing Flavor! Seasoning ! No Sugar-Low SodiumJammin Salmon Fish Rub. Amazing Flavor! Seasoning ! No Sugar-Low Sodium $6.99
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2-Pack White Tail-Spinner Lure for Bass - 1/2 oz.2-Pack White Tail-Spinner Lure for Bass - 1/2 oz. $12.00 Lot of 2 Camo Hunting Fishing Baseball Hats CapsLot of 2 Camo Hunting Fishing Baseball Hats Caps $8.88
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(Lot Of 3) Xcalibur Xcs100 Square Lip Silent 1/20Z Xcs100Cf04 Ditch Craw J1401(Lot Of 3) Xcalibur Xcs100 Square Lip Silent 1/20Z Xcs100Cf04 Ditch Craw J1401 $8.50 (Lot Of 2) Yo Zuri 3Db Square-Lip Shallow R1105-Ppt 2 3/4" 9/16Oz E6102(Lot Of 2) Yo Zuri 3Db Square-Lip Shallow R1105-Ppt 2 3/4" 9/16Oz E6102 $4.69
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(Lot Of 3) Rick Clunn The Freak Series 3 3/4Oz Rcd2S3-51-1 Turquoise Lime G2116(Lot Of 3) Rick Clunn The Freak Series 3 3/4Oz Rcd2S3-51-1 Turquoise Lime G2116 $4.33 Vintage Original Heddon Zara Spook Topwater Lure Lot 1, Fishing TackleVintage Original Heddon Zara Spook Topwater Lure Lot 1, Fishing Tackle $5.99
Vintage Bagley's 3 1/4" From Tail To End Of Lip In Overall Good Shape!Vintage Bagley's 3 1/4" From Tail To End Of Lip In Overall Good Shape! $16.14 Was:  Previous Price $18.99 Vintage Wicker Fishing Basket Leather Top & Strap Brass HardwareVintage Wicker Fishing Basket Leather Top & Strap Brass Hardware $9.99
Morris Katz postcard Artist with artwork Studio Jerusalem Israel fishing fishMorris Katz postcard Artist with artwork Studio Jerusalem Israel fishing fish $4.49 Athletic Workout Top Size Petite Medium Orange -Exertek-Nwt-Retail $36!Athletic Workout Top Size Petite Medium Orange -Exertek-Nwt-Retail $36! $12.95
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Flounder Gigging Light Pvc Head Led 36 Watts 3600 Lm 12 Volt (Fishing, Fish) 1"Flounder Gigging Light Pvc Head Led 36 Watts 3600 Lm 12 Volt (Fishing, Fish) 1" $54.99 Tan Fishing Lure Fabric Cork Twill Weight Cotton 2 Yds X 60” Wide F20Tan Fishing Lure Fabric Cork Twill Weight Cotton 2 Yds X 60” Wide F20 $18.00
Set Of 2 Kitchen Towels, 1 Valentines 1 Easter, Both NewSet Of 2 Kitchen Towels, 1 Valentines 1 Easter, Both New $5.00 The Upside-Down Fish (Coloring Book!) by Richard MacNeill (English) Paperback BoThe Upside-Down Fish (Coloring Book!) by Richard MacNeill (English) Paperback Bo $13.41
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(Lot Of 3) Smithwick Top 20 Rogue 5.5" 5/8Oz Adrd531Ob Chrome/Black-Orange C8101(Lot Of 3) Smithwick Top 20 Rogue 5.5" 5/8Oz Adrd531Ob Chrome/Black-Orange C8101 $6.83 (Lot Of 3)Rick Clunn Stx 1/2Oz Rcstxf-44-1 Floater Black Diamond G1107(Lot Of 3)Rick Clunn Stx 1/2Oz Rcstxf-44-1 Floater Black Diamond G1107 $3.25
New Disney Princess Dominoes + Magical Gems Fishing Game 2-4 Players NibNew Disney Princess Dominoes + Magical Gems Fishing Game 2-4 Players Nib $10.00 Supreme Dardevle Lure .75oz fishing lure Fire TigerSupreme Dardevle Lure .75oz fishing lure Fire Tiger $49.99
Jlvlures Frantic Minnow Lure- Jfm133Tr- Clear Clown Lure Shallow Diving MinnowJlvlures Frantic Minnow Lure- Jfm133Tr- Clear Clown Lure Shallow Diving Minnow $2.69 5 Auction Catalogs of Fishing Collectibles, Lures etc., 1994-2002, Extra Papers5 Auction Catalogs of Fishing Collectibles, Lures etc., 1994-2002, Extra Papers $9.95
Daiwa Tatula 100Hsl Left handDaiwa Tatula 100Hsl Left hand $84.00 Omega-3 Fatty Acids Fish Oil for Dogs or Cats & Small Dogs 100% Pure, Non-GmoOmega-3 Fatty Acids Fish Oil for Dogs or Cats & Small Dogs 100% Pure, Non-Gmo $30.59
Sparkly Rust Colored Goldstone? Fish Pin Vintage Brooch EucSparkly Rust Colored Goldstone? Fish Pin Vintage Brooch Euc $19.99 Was:  Previous Price $24.99 Vintage 1940's Fishing for Bluefish magazine adVintage 1940's Fishing for Bluefish magazine ad $4.95
Group Lot Of 2 Clark Popper Woods Spot Minnow Vintage Fishing Lure Lures TackleGroup Lot Of 2 Clark Popper Woods Spot Minnow Vintage Fishing Lure Lures Tackle $7.75 Fly Fishing Flies (Bass, Bream, Trout, Perch) Bead Head Crystal Bugger Olive (6)Fly Fishing Flies (Bass, Bream, Trout, Perch) Bead Head Crystal Bugger Olive (6) $10.75
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Prices current as of last update, 07/04/20 6:21pm.

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