Killi
Families of Aquarium Fishes

Anabantiformes
Anabantoidei
Channoidei Nandoidei

Labyrinth fishes

Instead of gills, these fish use a rudimentary lung to obtain oxygen and are "air breathers". They have gills too, which they also use but can in fact drown if deprived of a source of air.


Anguilliformes
Anguilloidei
Congroidei

True Eels


Atheridae
Elassomatidae
Melanotaeniidae Percichthyidae

Many related families

Shorefishes, pond and creek fish.



Discus
Cichlinae Etroplinae
Pseudocrenilabrinae Ptychochrominae

Cichlids



Cypriniformes
Cobitoidea
Cyprinoidea

Loaches


Cyprinodontiformes
Aplocheiloidei
Cyprinodontoidei Poeciliidae

Tooth-Carps

The egg laying tooth-carps ("Killifish") and the live bearing tooth-carps ("Livebearers").


Gobiiformes
Eleotridae
Gobioidei Odontobutidae

Gobies and sleepers


Perciformes
Percichthyidae
Percidae

Perch

Taxonomy of the Percidae


Siluriformes
Diplomystidae
Loricarioidei Siluroidei

Catfish


Synbranchiformes
Macrognathus
Mastacembelus Synbranchus

Eels



Freshwater Aquarium Fishes






Encyclopedia Aquatica