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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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Zebco Fishing Reel 202 Slingshot Used Great ConditionZebco Fishing Reel 202 Slingshot Used Great Condition $8.95 Okuma Rods and Reels Bass fishing sticker 4.5"x8"Okuma Rods and Reels Bass fishing sticker 4.5"x8" $6.25
Lews Fishing Lsg1Smg,Laser Mg Speed Spool Mcs Lsg1SmgLews Fishing Lsg1Smg,Laser Mg Speed Spool Mcs Lsg1Smg $79.95 List price: Previous Price $118.95 Deep Fryer With Basket Outdoor Aluminum Fish Cooker Restaurant CommercialDeep Fryer With Basket Outdoor Aluminum Fish Cooker Restaurant Commercial $77.02
Fish Tuning - Dsp5 Position Switch for Efi Live tuning (Purple Wire) Lly DuramaxFish Tuning - Dsp5 Position Switch for Efi Live tuning (Purple Wire) Lly Duramax $37.00 Hot Fish Shop – Winona, Minnesota – Sugar Loaf Hill – U.S. Highways 14, 61 & 43Hot Fish Shop – Winona, Minnesota – Sugar Loaf Hill – U.S. Highways 14, 61 & 43 $2.00
Lews Fishing Sdu10-2,Mr C Slab Daddy Underspin Combo Sdu10-2Lews Fishing Sdu10-2,Mr C Slab Daddy Underspin Combo Sdu10-2 $60.28 List price: Previous Price $61.95 Berkley Havoc Skeet Reese Design 5.5" Papa Sick Fish Disco Shad Hvmsf5-Dsh 302FBerkley Havoc Skeet Reese Design 5.5" Papa Sick Fish Disco Shad Hvmsf5-Dsh 302F $3.99
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Lews Fishing Laptm8Cl,Apt Speed Mono 500 Yds Clear(Bx) Laptm8ClLews Fishing Laptm8Cl,Apt Speed Mono 500 Yds Clear(Bx) Laptm8Cl $14.78 List price: Previous Price $24.95 10 14k gold filled fish hook earring wires 21 gauge10 14k gold filled fish hook earring wires 21 gauge $17.16
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Klein Tools Must-Have 3-Piece High Strength Fish and Glow Rod Attachment SetKlein Tools Must-Have 3-Piece High Strength Fish and Glow Rod Attachment Set $48.26 Grace Jamaican Style Fish Tea Flavored Soup Mix (Pack of 3) 1.59 oz per PacketGrace Jamaican Style Fish Tea Flavored Soup Mix (Pack of 3) 1.59 oz per Packet $14.99
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Huk Fishing Kryptek Short Sleeve Shirt H1200088-Gtf, Tree FrogHuk Fishing Kryptek Short Sleeve Shirt H1200088-Gtf, Tree Frog $34.99 Euc Mens Christian Dior Fish Print S/S Button Down Cotton Shirt L Geek PreppyEuc Mens Christian Dior Fish Print S/S Button Down Cotton Shirt L Geek Preppy $9.99
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Ll Bean Mens Nylon Waterproof Stocking Foot Fly Fishing Chest Waders M MediumLl Bean Mens Nylon Waterproof Stocking Foot Fly Fishing Chest Waders M Medium $16.00 Zebco Fishing Reel 202 Used Good ConditionZebco Fishing Reel 202 Used Good Condition $7.95
Eagle Mach 1 Computer Graph Fish Finder UntestedEagle Mach 1 Computer Graph Fish Finder Untested $16.59 Was: Previous Price $19.99 Girls Size 6-9 Months Sonoma 2 Piece Lime Green Fish Shorts Outfit Summer NewGirls Size 6-9 Months Sonoma 2 Piece Lime Green Fish Shorts Outfit Summer New $9.99
Amazing Natural Omega 3 Alaska Deep Sea Fish Oil 1000 mg 200 SoftgelsAmazing Natural Omega 3 Alaska Deep Sea Fish Oil 1000 mg 200 Softgels $10.49 Whole Wireharness B for Fish Head gas scooter 43cc,49ccWhole Wireharness B for Fish Head gas scooter 43cc,49cc $19.99
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Vintage V-Mag3 Bait Cast Ryobi Quility Japan Fishing Reel 4 lure tackle box baitVintage V-Mag3 Bait Cast Ryobi Quility Japan Fishing Reel 4 lure tackle box bait $39.99 Tropical Travelogue Bty Graphic 45 Wilmington Tonal Tonal Golden Tan FishTropical Travelogue Bty Graphic 45 Wilmington Tonal Tonal Golden Tan Fish $7.99
2 Pcks Berkley Black Fishing Wire Leader Connector Sleeves Size 4 Qty 25 60-80lb2 Pcks Berkley Black Fishing Wire Leader Connector Sleeves Size 4 Qty 25 60-80lb $9.95 Lews Fishing Ah70Ms,American Hero Speed Sticks Ah70MsLews Fishing Ah70Ms,American Hero Speed Sticks Ah70Ms $79.23 List price: Previous Price $95.95
20' x 9' Fishing Net Crab Lobster Seahorse Starfish Shells Children Room Boy20' x 9' Fishing Net Crab Lobster Seahorse Starfish Shells Children Room Boy $17.99 Stingray Fish Wooden Sculpture spins on base Sting Ray Ocean Sea FigurineStingray Fish Wooden Sculpture spins on base Sting Ray Ocean Sea Figurine $14.99
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Lews Fishing Wmt16-3,Wally M Signature Troll Tech Rods Wmt16-3Lews Fishing Wmt16-3,Wally M Signature Troll Tech Rods Wmt16-3 $97.56 List price: Previous Price $116.95 Lews Fishing Mc12Pl2G,Slab Shaker Graphite Rods Mc12Pl2GLews Fishing Mc12Pl2G,Slab Shaker Graphite Rods Mc12Pl2G $57.10
Garcia 9800 Vintage Fishing Spinning Reel Made In JapanGarcia 9800 Vintage Fishing Spinning Reel Made In Japan $13.95 Disney Finding Nemo Dory Fish Plush Doll Figure Toy Soft Stuffed Animal Gift 6"Disney Finding Nemo Dory Fish Plush Doll Figure Toy Soft Stuffed Animal Gift 6" $16.97
Lews Fishing Cg14L-3,Slab Shaker Custom Graphite Rods Cg14L-3Lews Fishing Cg14L-3,Slab Shaker Custom Graphite Rods Cg14L-3 $68.83 List price: Previous Price $77.95 Mens Penguin by Munsingwear Boxer Brief Large 36-38 Blue Orange Gray Fish GearMens Penguin by Munsingwear Boxer Brief Large 36-38 Blue Orange Gray Fish Gear $19.99
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Fish-N-Map Puget Sound South Olympia Tacoma Seattle Fishing FishermanFish-N-Map Puget Sound South Olympia Tacoma Seattle Fishing Fisherman $10.16 Was: Previous Price $11.29 3 Lot-Gone Fishing Bookmarks-Sign Fly Fish Sport Rod Pole Hobby Book Mark Card3 Lot-Gone Fishing Bookmarks-Sign Fly Fish Sport Rod Pole Hobby Book Mark Card $7.99
Silver Two Very Detailed Fish on Silver ChainSilver Two Very Detailed Fish on Silver Chain $9.99 Vintage Penn Peer no.109 Level-Wind Saltwater / freshwater Fishing Reel SilversVintage Penn Peer no.109 Level-Wind Saltwater / freshwater Fishing Reel Silvers $15.99
6 Segment Swimbait Lures Fishing Bait Fish Lure Crankbait 11cm6 Segment Swimbait Lures Fishing Bait Fish Lure Crankbait 11cm $8.00 Lot of 7 Fishing Baits, Worms - Kinami Baits - Strike King - Big Bite BaitsLot of 7 Fishing Baits, Worms - Kinami Baits - Strike King - Big Bite Baits $19.99
3 Old Vintage Casting Fishing Rods Gc Johnny Walker+Unmarked3 Old Vintage Casting Fishing Rods Gc Johnny Walker+Unmarked $9.99 White Vinyl Decal - Sailfish sail fish ocean saltwater fishing fun sticker boatWhite Vinyl Decal - Sailfish sail fish ocean saltwater fishing fun sticker boat $4.75
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Vintage Heddon Lucky 13 fish Lure 3 Treble HooksVintage Heddon Lucky 13 fish Lure 3 Treble Hooks $4.99 Andrea by Sadek Green and White Porcelain Fish Pair Fish Net DesignAndrea by Sadek Green and White Porcelain Fish Pair Fish Net Design $24.95
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Cod: A Biography of the Fish that Changed the World by Mark KurlanskyCod: A Biography of the Fish that Changed the World by Mark Kurlansky $10.97 Mint Euc Mens Southern Tide Fish Logo Plaid Checks L/S Button Down Shirt XlMint Euc Mens Southern Tide Fish Logo Plaid Checks L/S Button Down Shirt Xl $11.27
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Taco Metals Shock Cord Roller Cok-00020-1 Out RiggersTaco Metals Shock Cord Roller Cok-00020-1 Out Riggers $18.00 1910 Rppc Postcard of Fishing Pole, Creel and Days Catch of 30 Fish1910 Rppc Postcard of Fishing Pole, Creel and Days Catch of 30 Fish $33.99 Was: Previous Price $39.99
1908 Gentleman Fishing "Only A Nible" 4351908 Gentleman Fishing "Only A Nible" 435 $7.44 Just Hook It Fishing Sweatshirt Men's Sizes/Colors (950)Just Hook It Fishing Sweatshirt Men's Sizes/Colors (950) $22.99 to $28.99
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Prices current as of last update, 08/16/17 12:20pm.

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