• Melanotaeniidae - (Rainbowfishes, blue eyes)

Characiformes - characins

• Alestidae - (African tetras)
• Anostomidae - (Headstanders)
• Characidae - (Characins)
• Chilodontidae - (Headstanders)
• Crenuchidae - (South American darters)
• Ctenoluciidae - (Pike-characids)
• Cynodontidae - (Dogtooth characins)
• Distichodontidae - (African characins)
• Erythrinidae - (Trahiras)
• Gasteropelecidae - (Freshwater hatchetfishes)
• Hemiodontidae - (Halftooths)
• Hepsetidae - (Pike characins)
• Lebiasinidae - (Pencilfishes)
• Prochilodontidae - (Flannel-mouth characiforms)

Cyprinodontiformes - rivulines, killifishes and live bearers

• Nothobranchiidae - (African rivulines)
• Poeciliidae - (Live bearers)

Cypriniformes - carps

• Balitoridae - (River loaches)
• Catostomidae - (Suckers)
• Cobitidae - (Loaches)
• Cyprinidae - (Minnows or carps)
• Gyrinocheilidae - (Algae eaters)
• Psilorhynchidae - (Mountain carps)

Gymnotiformes - knifefishes

• Apteronotidae - (Ghost knifefishes)
• Gymnotidae - (Naked-back knifefishes)
• Hypopomidae - (Bluntnose knifefishes)
• Rhamphichthyidae - (Sand knifefishes)
• Sternopygidae - (Glass knifefishes)

Lepidosireniformes - South American and African lungfishes

Lepisosteiformes - gars

• Lepisosteidae - (Gars)

Osteoglossiformes - bony tongues

• Arapaimidae - (Bonytongues)
• Mormyridae - (Elephantfishes)
• Notopteridae - (Featherbacks or knifefishes)
• Osteoglossidae - (Arowanas)
• Pantodontidae - (Freshwater Butterflyfish)

Perciformes - perch-like

• Anabantidae - (Climbing gouramies)
• Channidae - (Snakeheads)
• Cichlidae - (Cichlids)
• Datnioididae - (Freshwater tripletails)
• Gobiidae - (Gobies)
• Helostomatidae - (Kissing gourami)
• Monodactylidae - (Moonyfishes or fingerfishes)
• Osphronemidae - (Gouramies)
• Polycentridae - (Leaffishes)
• Toxotidae - (Archerfishes)

Polypteriformes - bichirs

• Polypteridae - (Bichirs)

Rajiformes - skates and rays

• Dasyatidae - (Stingrays)

Siluriformes - catfish

• Ariidae - (Sea catfishes)
• Aspredinidae - (Banjo catfishes)
• Auchenipteridae - (Driftwood catfishes)
• Bagridae - (Bagrid catfishes)
• Callichthyidae - (Callichthyid armoured catfishes)
• Chacidae - (Squarehead or angler catfish)
• Clariidae - (Air breathing catfishes)
• Claroteidae - (Claroteid catfishes)
• Doradidae - (Thorny catfishes)
• Heteropneustidae - (Stinging catfish)
• Loricariidae - (Armoured catfishes)
• Mochokidae - (Squeakers or upside-down catfishes)
• Pangasiidae - (Shark catfishes)
• Pimelodidae Pimelodidae - (Long-whiskered catfishes)
• Siluridae - (Sheatfishes)

Synbranchiformes - spiny eels

• Mastacembelidae - (Spiny eels)

Tetraodontiformes - puffers

• Tetraodontidae - (Puffers)

Fresh water inverts

• Inverts