The Bony Fishes (Osteichthyes) - superclass
over 435 families in 45 orders
The Ray-Finned Fishes (Actinopterygii) - class
(Chondrostei) - subclass
The Sturgeons & Paddlefishes
(Acipenseriformes)
- order
The
(Cheirolepidiformes)
- order
The
(Guildayichthyiformes)
- order
The
(Luganoiiformes)
- order
The
(Palaeonisciformes)
- order
The
(Perleidiformes)
- order
The
(Phanerorhynchiformes)
- order
The
(Pholidopleuriformes)
- order

(Polypteriformes)
- order
The
(Ptycholepiformes)
- order
The
(Saurichthyiformes)
- order
The
(Tarrasiiformes)
- order
(Neopterygii) - subclass
The Bowfins & Gars (Holostei) - infraclass
The Gars
(Lepisosteiformes)
- order
The Bowfin
(Amiiformes)
- order
The Bowfin
(Pachycormiformes)
- order
(Teleostei) - infraclass
(Osteoglossomorpha) - superorder
The Bony-Tongued Fishes
(Osteoglossiformes)
- order
The Mooneye and Goldeye
(Hiodontiformes)
- order
(Elopomorpha) - superorder
The Ladyfishes and Tarpon
(Elopiformes)
- order
The Bonefishes
(Albuliformes)
- order
The Halosaurs and Spiny Eels
(Notacanthiformes)
- order
The True Eels
(Anguilliformes)
- order
The Gulper Eel
(Saccopharyngiformes)
- order
(Clupeomorpha) - superorder
The Herrings and Anchovies
(Clupeiformes)
- order
(Ostariophysi) - superorder
The Milkfishes
(Gonorynchiformes)
- order
The Barbs, Carps, Danios, Goldfishes, Loaches, Minnows, Rasboras
(Cypriniformes)
- order
The Characins, Pencilfishes, Hatchetfishes, Piranhas, Tetras.
(Characiformes)
- order
The Electric Eels and Knifefishes
(Gymnotiformes)
- order
The Catfishes
(Siluriformes)
- order
(Protacanthopterygii) - superorder
The Barreleyes and Slickheads
(Argentiniformes)
- order
The Salmon and Trout
(Salmoniformes)
- order
The Pike
(Esociformes)
- order
The Smelts and Galaxiids
(Osmeriformes)
- order
(Stenopterygii) - superorder
The Jellynose Fish
(Ateleopodiformes)
- order
The Bristlemouths and Marine Hatchetfishes
(Stomiiformes)
- order
(Cyclosquamata) - superorder
The Bombay Duck and Lancetfishes
(Aulopiformes)
- order
(Scopelomorpha) - superorder
The Lanternfishes
(Myctophiformes)
- order
(Lampridiomorpha) - superorder
The Oarfish, Opah and Ribbonfishes
(Lampriformes)
- order
(Polymyxiomorpha) - superorder
The Beardfishes
(Polymixiiformes)
- order
(Paracanthopterygii) - superorder
The Cavefishes and Trout-Perches
(Percopsiformes)
- order
The Toadfishes
(Batrachoidiformes)
- order
The Anglerfishes
(Lophiiformes)
- order
The Cods
(Gadiformes)
- order
The Psearlfishes
(Ophidiiformes)
- order
(Acanthopterygii) - superorder
The Mullets
(Mugiliformes)
- order
The Silversides and Rainbowfishes
(Atheriniformes)
- order
The Flyingfishes
(Beloniformes)
- order
The Whalefishes
(Cetomimiformes)
- order
The Live-Bearers, Killifishes
(Cyprinodontiformes)
- order
The Ridgeheads
(Stephanoberyciformes)
- order
The Fangtooths and Pineconefishes
(Beryciformes)
- order
The Dories
(Zeiformes)
- order
The Clingfishes
(Gobiesociformes)
- order
The Sticklebacks
(Gasterosteiformes)
- order
The Seahorses and Pipefishes
(Syngnathiformes)
- order
The Swamp Eels
(Synbranchiformes)
- order
The Sunfish, Filefishes & Pufferfish
(Tetraodontiformes)
- order
The Flatfishes
(Pleuronectiformes)
- order
The Scorpionfishes and the Sculpins
(Scorpaeniformes)
- order
The Anabantids, Bass, Cichlids, Gobies, Gouramis, Mackerel, Perches, Scats, Whiting, Wrasses
(Perciformes)
- order
The Lobe-Finned Fishes (Sarcopterygii) - class
The Coelacanths (Actinistia) - infraclass

()
- order -extinct-
The Coelacanths
(Coelacanthiformes)
- order

()
- order
The (Tetrapodomorpha) - infraclass -extinct-

(Rhizodontida)
- order -extinct-

(Osteolepiformes)
- order -extinct-

(Panderichthyida)
- order -extinct-
The Lungfishes (Dipnoi) - subclass
The (Dipnomorpha) - infraclass

(Porolepiformes)
- order -extinct-

(Ceratodontiformes)
- order
The Lungfishes
(Lepidosireniformes)
- order