Siluriformes

Loricariidae - Loricariidae is the largest family of catfish , with almost 700 species and new species being described each year.

Aspredinidae - The Aspredinidae are a small South American family of catfishes also known as the banjo catfishes.

Mochokidae - The Mochokidae are a family of catfishes that are known as the squeakers and upside-down catfish.

Doradidae - Doradidae is a family of catfishes also known as thorny catfishes or talking catfishes.

Trichomycteridae - Trichomycteridae is a family of catfishes commonly known as the pencil or parasitic catfishes.

Heptapteridae - Heptapteridae is a family of catfish that originate from Mexico to South America.

Akysidae - The stream catfishes are family Akysidae of catfishes.

Auchenipteridae - The driftwood catfishes are catfishes of the family Auchenipteridae.

Pimelodidae - Pimelodidae, commonly known as the long-whiskered catfishes, is a family of catfishes .

Schilbeidae - The schilbid catfishes are a family of catfishes native to Africa and southern Asia.

Claroteidae - The Claroteidae are a family of catfish found in Africa.

Amblycipitidae - Amblycipitidae is a family of catfishes, commonly known as torrent catfishes.

Ictaluridae - The Ictaluridae, sometimes called Ictalurids, are a family of catfish native to North America, where they are important food fish and sometimes as a sport fish.

Ariidae - The Ariidae or ariid catfish are catfish that mainly live in marine waters with many freshwater and brackish water species.

Amphiliidae - Loach catfishes, Amphiliidae, are a family of catfishes .

Anchariidae - Anchariidae is a family of catfishes order.

Plotosidae - The eeltail catfish are a family of catfish whose tails are elongated in an eel-like fashion.

Callichthyidae - Callichthyidae is a family of catfishes , called armored catfishes due to the two rows of bony plates running down the length of the body.

Astroblepidae - Astroblepus is a genus of catfish which contains 54 species.

Austroglanididae - Austroglanis is the only genus in the catfish family Austroglanididae.

Erethistidae - Erethistidae are a family of catfishes that originate from southern Asia.

Sisoridae - Sisoridae is a family of catfishes .

Bagridae - Bagridae are a family of catfish that originate from Africa and Asia from Japan to Borneo.

Clariidae - Airbreathing catfishes are fishes comprising the family Clariidae of order Siluriformes.

Pseudopimelodidae - Pseudopimelodidae is a small family of catfishes.

Siluridae - Although silurids occur across much of Europe and Asia, they are most diverse in southeast Asia, beyond which their diversity decreases in temperate east Asia, the Indian subcontinent, southwest Asia, and Europe.

Cetopsidae - Cetopsidae is a small family of catfishes , commonly called the whale catfishes.

Chacidae - The name Chaca is derived from the fact that when removed from the water, they will rapidly repeat the sound "chaca".

Cranoglanididae - Cranoglanis bouderius was first described as Bagrus bouderius in 1846 by John Richardson based on a Chinese watercolor painting.

Diplomystidae - In traditional schemes, Diplomystidae is the basal, primitive sister group to all other catfishes .

Pangasiidae - The shark catfishes are a family, the Pangasiidae, of catfishes found in fresh and brackish waters across southern Asia, from Pakistan to Borneo.

Heteropneustidae - Airbreathing catfishes are fishes comprising the family Clariidae of order Siluriformes.

Lacantuniidae - It first came to the attention of scientists in 1996 when Rócio Rodiles-Hernández, a Mexican ichthyologist conducting a biotic survey on the river, collected the first specimens from the Chiapas-Guatemala border.

Malapteruridae - Electric catfish is the common name for the catfish family Malapteruridae.

Nematogenyidae - The body is naked and elongate.

Olyridae - Bagridae are a family of catfish that originate from Africa and Asia from Japan to Borneo.

Scoloplacidae - Scoloplax is the only genus in the catfish family Scoloplacidae, the spiny dwarf catfishes.