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CLASSES AND ORDERS OF FISHES

CLASS MYXINI (Hagfishes )

Order Myxiniformes

CLASS CEPHALASPIDOMORPHI (Lampreys )

Order Petromyzontiformes

CLASS ELASMOBRANCHII (Sharks , Rays , Guitarfish , Sawfish )

Order Hexanchiformes (Cow and frill sharks )
Order Heterodontiformes (Bullhead and Horn Sharks )
Order Orectolobiformes (Whale , Nurse , carpet , goblin sharks , and relatives)
Order Lamniformes (Tiger, Mackerel , Basking , and Thresher Sharks )
Order Carchariniformes (Houndsharks , Cat, Weasel, Requiem , Hammerhead Sharks , and relatives)
Order Squaliformes (Dogfish , Bramble Sharks )
Order Pristiophoriformes (Saw Sharks )
Order Squatiniformes (Angel Sharks )
Order Pristiformes (Sawfish )
Order Torpediniformes (Electric Rays )
Order Rajiformes (Skates and rays )
Order Myliobatiformes (Stingrays )
CLASS HOLOCEPHALI (Chimaeras )

Order Chimaeriformes
CLASS SARCOPTERYGII (Lungfishes , Coelacanths )

Order Coelacanthiformes (Coelacanths )
Order Ceratodontiformes (Australian Lungfishes )
Order Lepidosireniformes (South American and African Lungfishes )
CLASS ACTINOPTERYGII ( = Osteichthyes , or Bony Fishes)

Order Acipenseriformes (Sturgeons and Paddlefishes )
Order Polypteriformes (Bichirs )
Order Lepisosteiformes (Gars )
Order Amiifores (Bowfins )
Order Osteoglossiformes (Bonytongues , Arapaimas , Mooneyes , Elephantfishes , and knifefishes )
Order Elopifores (Tarpons Tenpounders )
Order Albuliformes (Bonefishes )
Order Notocanthiformes (Halosaurs , Spiny Eels )
Order Anguilliformes (eels )
Order Saccopharyngiformes (Bobtail Eels, Swallowers, Gulpers)
Order Clupeiformes (Herring , Shad , Sardines , Anchovies , Milkfishes )
Order Cypriniformes (Minnows , Carps , Loaches , Suckers)
Order Characiformes (Tetras , Hatchetfishes , Piranhas , and others)
Order Siluriformes (Catfishes )
Order Gymnotiformes (Knifefishes )
Order Salmoniformes (Pikes , mudminnows , Smelts , Salmon , trout , and others)
Order Stomiiformes (Bristlemouths , lightfishes , Viperfishes , Dragonfishes , Snaggletooths , Loosejaws , and others)
Order Aulopiformes (Greeneyes , pearleyes , Barracudinas , Daggertooths , Sabertooths , Lancetfishes , and others)
Order Myctophiformes (Lanternfishes , Brotulas , and others)
Order Batrachoidiformes (Toadfishes )
Order Lophiiformes (Anglerfishes )
Order Gobiesociformes (Clingfishes )
Order Atheriniformes (Silversides , Rainbowfishes )
Order Cyprinodontiformes (Rivulines , Killifishes , Goodeids , Livebearers , four-eyed fish)
Order Beloniformes (Medakas , Sauries , needlefishes , halfbeaks )
Order Lampriformes (Opahs , Velifers , Crestfishes , Tapertails , Ribbonfishes , Oarfishes , Threadtails , and others)
Order Beryciformes (Pinecone fishes, Lanterneye fishes, Squirrelfishes , Soldierfishes , Pricklefishes , Bearfishes , and others)
Order Cetomimiformes (Whalefishes )
Order Zeiformes (Dories , Oreos , Boarfishes )
Order Gasterosteiformes (Sand eels , Sticklebacks , Tubesnouts , Seamoths )
Order Syngnathiformes (Trumpetfishes , Cornetfishes , Snipefishes , Pipefishes , and Seahorses )
Order Synbranchiformes (Swamp-eels , Spiny-eels )
Order Scorpaeniformes (Scorpionfishes , Stonefishes , Thornyheads , waspfishes , Velvetfishes , Searobins , Gurnards , Greenlings , Cottids , sablefishes , Sculpins , Flatheads, Poachers , Snailfishes , and others)
Order Perciformes (Perches , Snooks , Basses , Groupers , Soapfishes , Basslets , Flagtails , Bigeyes , Cardinalfishes , Tilefishes , Silagos , Remoras , Jacks , Pompanos , Roosterfishes , Dolphinfishes , Snappers , Grunts , Breams , Croakers , Drums, Gatfishes , Spadefishes , batfishes , Scats , Butterflyfihes , Angelfishes , Cichlids , Damselfishes , Anemonefishes , Hawkfishes , Kelpfishes , Jawfishes , Mullets , Wrasses , Eelpouts , Gunnels , Swallowers , Gapers , Sand Lances , Stargazers , Blennies , Kelpfishes , Gobies , rabbitfishes , Surgeonfishes ,Barracudas , Mackerels , Swordfish , Marlin , Tunas , and many others)
Order Pleuronectiformes (Flounders , Halibut , Tonguefishes )
Order Tetraodontiformes (Triggerfishes , Filefishes , Puffers , Boxfishes , Porcupinefishes , Ocean Sunfishes )
Order Gadiformes (Cods , Haddocks , Hakes , Burbots , Grenadiers )
Order Percopsiformes (pirate and trout perches , Cavefishes )
Order Ophidiiformes (Cuskeels , Pearlfishes )

See also:

Background on Fishes
Fish bodyforms
Measuring fish
Fish tails and fins
Fish head structures
Fish body and mouth types
Fish teeth and gill structure
Phylum Chordata

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