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A fish is a water-dwelling vertebrate with gills. Most are cold-blooded. There are over 29,000 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).
Fish come in different sizes, from the 16 m (51 ft) whale shark to a 8 mm (just over ¼ 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, while closely resembling fish in outer appearance, are actually mammals.
Although most fish are exclusively aquatic and cold-blooded, there are exceptions to both cases. Fish from a number of different groups have evolved the capacity to live out of the water for extended periods of time. Of these amphibious fish some such as the mudskipper can live and move about on land for up to several days. Also, 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.
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Aquaculture :: Agriculture and Forestry
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Fish :: Pets
Give your holiday wallet a break today: Fish Taco Monday! Two delicious fish tacos and housemade chips & salsa, just $9.95 in the bar.
samschowder (Sams Chowder House) Mon, 21 Dec 2009 21:41:36 -0000
Give your holiday wallet a break today: Fish Taco Monday! Two delicious fish tacos and housemade chips & salsa, just $9.95 in the bar.
and for some reason looking at fish is making me ill.
the_stone_rose (Amanda Guilford) Mon, 21 Dec 2009 21:41:24 -0000
and for some reason looking at fish is making me ill.
angle rose and sea wave deep dive of turtle sea dolphin songs and fish move deep into the blue sea >
eengineerm (mohamad A . almbayed) Mon, 21 Dec 2009 21:41:20 -0000 Subscribe to Fish RSS feed
More - Offers reef aquariums including marine fish, corals, discus and inverts.
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Age of Aquarium - Specializes in custom aquariums. Also offers a wide selection of marine animals and dry goods.
Meta Description: [ Age of Aquarium
has designed and installed custom aquariums in executive
offices, corporate settings, county offices, medical
facilities, hospitals and restaurants. Designing a
beautiful aquarium is important to us, but not at the
cost of doing harm to our ocean and environment. ]
AmazonMoosey's Ambit - Focusing on aquarium and pond supplies. Also, bird and reptile products.
Anchor Bay Aquarium - Rare and exotic tropical fish and plants. Also, books and fish food.
Meta Description: [ Tropical fish, Birds, Reptiles, Supplies for all pets ]
Aquacon - Saltwater fish, live corals, clams, anemones and inverts along with books and supplies.
Meta Description: [ Saltwater Fish and Saltwater Fish Aquarium website offering live rock, live saltwater fish ,live corals, all aquarium supplies including aquarium lighting, aquarium chillers, aquarium filtration. ]
Aquarium City - Supplies custom aquariums, acrylic and glass and a range of accessories and livestock.
Meta Description: [ Aquarium City Store for quality aquariums,supplies of all types of aquariums custom hand made specails,acrylic aquariums glass aquariums,accessories ]
Aquarium City - Provide a range of aquariums including custom built tanks, stands and canopys, reverse osmosis units, pond products, livestock, plants and general aquatic supplies.
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Aquariums Hawaii - Offers design for artificial reefs, fabricated reefs, marine aquariums, provides maintenance for reef systems.
Meta Description: [ Aquariums Hawaii is the State's most experienced creator, constructor and mainainter of aqauriums. The company also manufactures artificial reefs. ]
Aquatic Technology - Columbia, Ohio retail outlet offering live stock, supplies, and advice for reef and marine systems.
Meta Description: [ Aquatic Technology sells marine livestock, live rock, reef aquarium supplies, metal halide, compact fluorescent, vho lighting ]
AquaticHouse - Pond kits, aquarium filtration and supplements.
Meta Description: [ Your online source for quality aquarium supplies and pond products at great prices. Fish supplies for all types of Aquariums and water gardens with fast shipping. ]
Armke's Rare Aquarium Fish - Cichlids, tetras and catfishes from Africa. Also carries plants, food, books and aquariums.
Meta Description: [ ARMKE'S RARE AQUARIUM FISH. Specializing in African cichlids and Synodontis catfish. Will ship anywhere. PRICE LIST ]
Coral Planet - Features live corals, fish, inverts and supplies.
Meta Description: [ Wholesale corals, Wholesale Fiji Corals, Coral Propagation, Live Corals, Coral Propagation, Coral Propagation. ]
CoralFarms - Solomon Island cultured SPS corals, clams and reef aquarium hardware.
Cquarium - Marine fish, live corals, invertebrates and reef aquarium supplies.
Meta Description: [ Marine life to your door with 3 days live guarantee. Acrylic aquariums,live rock, SPS corals, light systems. ]
Dallas North Aquarium - Dallas retail store. Offers live fresh and salt water fish, invertebrates, corals, and supplies.
Exotic Aquarium - Offers fish supplies, livestock, setup, and maintenance. Retail location in Detroit, Michigan.
Meta Description: [ Exotic Aquarium is Detroit's Premier Tropical Fish store, serving Metro Detroit since 1951. We carry one of the areas largest selections of Tropical Fish and related supplies for your Aquarium. ]
Fish Fur and Feather - A UK supplier of products for fish, dogs, cats, birds and other small animals.
Meta Description: [ Aquarium, Fish and Pet Supplies in the UK. Secure online store for filters, pumps, skimmers, leads, bowls, collars, cages, halides, lights, fish food, toys, books. ]
Fish Highway - Site demonstrates how to construct a water-filled tube connecting aquarium tanks overhead allowing tropical fish to travel between tanks.
Meta Description: [ Fish Highway is a mind
boggling aquarium installation for your home or business.
Watch as fish swim out of the tank and across the ceiling
in a water filled highway that seems to defy gravity. ]
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FishSupply.com - Marine fish, freshwater fish, corals, invertebrates and aquarium equipment.
Fishworld - Supplier of tropicals, marines, coldwaters and discus as well as food.
Meta Description: [ No Summary ]
Frank's Aquarium and Freshwater Shrimp Farm - Supplies freshwater shrimp and crabs, equipment, ornaments and food.
Meta Description: [ freshwater shrimp, freshwater crabs, crayfish, crawdads, Cyclop-eeze, mudbugs,freshwater pipefish, freshwater aquarium, barbs, aquarium plants ]
Garden Tropical Fish Farm - Singapore-based breeder and exporter of tropical fish, invertebrates and aquatic plants.
Get Tanked Aquariums - Supplies Corals, Marine fish, inverts, live rock and supplies. Custom made: stands and canopies, wet/dry filters and protein skimmers. Maintenance service. Store located in Carlisle, Pennsylvania.
Meta Description: [ Get Tanked Aquariums, your saltwater connection. Maintenance service available. Serving saltwater coral reef hobbyists. Custom made: stand/canopies, protein skimmer, wet/dry filters, Professional Grade additives / calcium, Carlisle, Pennsylvania ]
Global Aquarium Supply - Supplies and livestock for your reef or marine fish tank.
Meta Description: [ Global Aquarium Supply is your one stop source for all your Salt Water Aquarium needs! We carry Aquariums, acrylic aquariums, Hamilton Lighting, Metal Halide lighting, Power Compacts, Protein Skimmers, ASM Skimmers, Euroreef skimmers, AquaC Skimmers, Iwaki pumps, Eheim Pumps, Rio pumps, MagDrive ... ]
Guan Mee Trading - Asia based breeder and exporter of the flower horn (hualorhan)fish.
Innovative Aquatics - Dosing pumps for digital reef systems.
Meta Description: [ Dosing Pumps for Reef Aquarists: Precision Digital pumps at reasonable prices. We offer a wide selection of top quality, guaranteed, nearly silent dosing pumps with a 100% guarantee. ]
Jonah's Aquarium - Offers fish species, equipment and supplies for freshwater, marine and coldwater aquaria and ponds.
L Aquatics - Specializing in marine and reef aquarium equipment, supplies and livestock.
Meta Description: [ Quality Aquarium supplies, equipment, and livestock at reasonable prices. ]
Laurel Mountain Angelfish - Offers angelfish, custom tanks and supplies.
Meta Description: [ Laurel Mountain Angelfish, quality angels at an affordable price. ]
Magic Pellet - Offers pond maintenance equipment and koi food.
Meta Description: [ FishFoods.com is your one stop for all of your pet supply needs. High quality premium dog, cat, bird, fish products at competitive prices. ]
Marine Center - Specializing in net-collected fish and hand picked corals. Also offers accessories and books.
Meta Description: [ The Marine Center, your source for the rarest, net collected fish and corals. Since 1994, the web's most trusted name in marine livestock. ]
Marine Depot - Hardware, food and additives as well as livestock and live rock/sand for aquariums.
Meta Description: [ . Aquarium supplies for your tropical fish, saltwater fish, reef aquarium, marine fish & saltwater aquarium. ]
MTC Distributors, Inc. - Features marine fish, invertebrates and aquarium hardware.
Meta Description: [ One of the largest U.S. mail-order marine fish livestock suppliers. ThePetStop.com is the #1 source for quality marine fish, aquariums and supplies for fish, invertebrates, corals ]
North Coast Marines - Livestock, including coral. Complete line of aquarium supplies and hardware.
Meta Description: [ If you are looking for top quality pet supplies for either your saltwater fish or your dog,
you have come to the right place. Come in and have a look around. Check out our dog grooming supplies featuring brand names
like Booster Bath, Furminator and Metro Dryer. In our aquarium supplies sectio... ]
Pet Solutions - Fish and aquarium supplies, feed, live plants, faq, and contact information.
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bird, reptile and small animal at Pet Solutions. Since 1950, we have offered a
large selection of pet products, and pride ourselves in providing the best
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]
Premium Aquatics - Text list of hardware and livestock for sale. Indianapolis.
Meta Description: [ Our company specifies in live rock, and also aquarium supply and aquarium lighting. Online source for saltwater marine fish, corals, clams, invertebrates and live rock. ]
Reef Splendor - Offers additives, food, lighting, medications, filtration devices, pumps, substrates, and product information.
Sand, Sea and Sky - Cichlid breeder offers product and specialized foods.
Seahorse Australia - Specialist farm producing seahorses for home and commercial saltwater aquariums. Also carries aquarium accessories, books and seahorse-related gift items.
Meta Description: [ Seahorse Australia is a specialist farm producing seahorses for home and commercial saltwater aquariums. We also supply aquarium accessories, books, art and craft - everything for seahorse lovers ]
SeaQuest Marine - Offers dry goods including skimmers, lighting, calcium reactors, RO/DI, pumps, wavemakers, chillers, filters, heaters, and sterilizers for marine and reef aquariums.
Meta Description: [ Find discount aquarium supplies at Seaquestmarine.com. Choose from a huge selection of marine aquarium supplies and reef aquarium supplies. ]
Souta's Saltwater - Portland based general saltwater livestock and supplies.
Meta Description: [ Saltwater Corals include acropora coral frags and soft corals. ]
Stocklys Aquariums of Hawaii - Raises and sells Red Shrimp, seaweed and live rock. Manufacturers of the EcoCosm closed ecosystem- an educational product for home and schools.
Meta Description: [ EcoCosm is a closed ecosystem, a fully self contained, self sustaining aquarium. ]
Thiel's InfoBase - Database of articles on reef and marine aquaria. Includes discussion forum and newsletter.
Meta Description: [ Saltwater Aquarium and Reef Corals Reference Site, Saltwater Aquarium and Reef Corals Reference Site ]
Trilby Tropicals - Supplying freshwater fish, live aquatic plants and hardware. Retail outlet in Toledo, Ohio.
Meta Description: [ Aquarium ]
Utah Koi - Koi and various pond supplies.
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