Killi
Fish
   Anabantiformes
   Anguilliformes
   Atheridae
   Characiformes
   Cichlidae
   Cyprinidae
   Cypriniformes
   Cyprinodontiformes
   Gobiiformes
   Perciformes
   Siluriformes
   Synbranchiformes
   More
     Adrianichthyidae
     Ambassidae
     Archiridae
     Badidae
     Batrachoidinae
     Blenniidae
     Centrarchidae
     Channidae
     Datnioidae
     Esociformes
     Galaxiidae
     Gasterosteidae
     Gymnotiformes
     Indostomas
     Monodactylidae
     Mormyridae
     Mugilidae
     Neoceratodontidae
     Ophidiidae
     Pantodontidae
     Phractolaemidae
     Polypterus
     Potamotrygonidae
     Retropinnidae
     Syngnathidae
     Tarumaniidae
     Terapontidae
     Tetraodontidae
     Tetrarogidae
     Toxotidae
     Zenarchopteridae
     Cave
How-to
Inverts
Misc
Plants
Xlibris

Adrianichthyidae
Adrianichthyinae
Oryziinae

Rice fish


Ambassidae
Ambassis
Parambassis

Glassfish


Archiridae

Flatfishes


Badidae
Badis
Dario

Badis


Batrachoidinae
Batrachus

Toadfish


Blenniidae
Blenniinae
Salariinae

Black Crappie (Pomoxis nigromaculatus) printed at the SCMBAS Gyotaku session. - Joe Cutler
Enneacanthus
Lepomis

Sunfish


Channidae

Snakeheads


Datnioidae

Tigerfish


Esociformes

Galaxiidae
Galaxiinae

Smelts


Gasterosteidae
Gasterosteus
Pungitius

Sticklebacks



Indostomas

Paradox fish


Monodactylidae

Monos


Mormyridae
Campylomormyrus
Marcusenius Pollimyrus

Whales and Elephants


One of the most evolved and intelligent of fishes, all possess an electrical system used to at the very least serve as an addition sense. All are on different frequencies so the possibility exists they communication with some sort of fish wifi.

If you were intelligent and had something like this how cold you not use it for at least some soft of communication? This might explain the different frequencies?


Mullet


Neoceratodontidae
Neoceratodus

Lungfish


Ophidiidae
Neobythitinae
Ophidiinae

Tusk eels

Included for completeness, these are some of the oldest fishes on earth. One holds the record for deepest fish ever found.


Pantodontidae
Pantodon

Butterfly fish


Phractolaemidae
Phractolaemus

Proto tetra



Potamotrygonidae
Paratrygon
Potamotrygon

Rays


Retropinnidae
Retropinninae

Australian Smelt


Syngnathidae
Nerophinae
Syngnathinae

Pipefish


Tarumaniidae

Dinofish

A family erected for a single primative species of fish nearly halfway between an eel and wolf fish (Holpias) that has an inflatable adipose fin.


Terapontidae
Hephaestus

Target fish



Tetrarogidae

Toxotidae

Archer Fish


Zenarchopteridae
Dermogenys
Hemirhamphodon Nomorhamphus

Halfbeaks


cave
Amblyopsis Astynax Barbatula Iranocypris
Milyeringa Phreatichthys Prietella Typhlichthys

Blind fish

In several places around the world fish have evolved cit off from all light for a very long time. Although not necessarily related to each other there are grouped here instead out of ichthyological curiosity.

Oliver Lucanus wrote a good article about these fish here.