All fish
190 fish so far, best known first. 1,001 more are on the list to be written.
GroupSharkRayCarpCatfishSalmonidHerringCodTunaPerch-likeCichlidReef fishEelFlatfishLivebearerAncientOther
WaterRivers and lakesEstuaries and mangrovesCoasts and shelvesCoral reefsOpen oceanDeep seaPolar and cold seasCaves and springsBetween sea and river
🇺🇸 United StatesTecopa pupfish
Extinct subspecies of killifish from California hot springs.Livebearer · Rivers and lakes · 1948
🇺🇸 United States and 2 morePupfish
Small killifish known for surviving in extreme isolated waters.Livebearer · Rivers and lakes
🇵🇪 Peru and 1 moreTiticaca orestias
Largest killifish of Lake Titicaca, likely extinct.Livebearer · Rivers and lakes
WorldAphyosemion
A large genus of small African killifish kept in home aquariums.Livebearer · Rivers and lakes
🇲🇽 Mexico and 3 moreXiphophorus
A genus of small livebearing fish native to Mexico and Central America, known for aquarium use and genetic research.Livebearer · Rivers and lakes
WorldKillifish
Small egg-laying fish known for hardiness and short lifespansLivebearer · Rivers and lakes
🇺🇸 United StatesLeast killifish
A tiny North American fish that gives birth to live young and measures just two centimetres long.Livebearer · Rivers and lakes
🇺🇸 United States and 4 moreMosquitofish
Small North American fish introduced globally for mosquito control.Livebearer · Rivers and lakes
🇺🇸 United StatesEastern mosquitofish
A small livebearing fish native to the eastern US, now invasive in many regions.Livebearer · Rivers and lakes · 1859
🇧🇷 Brazil and 1 moreLargescale four-eyes
Surface-dwelling fish with split eyes for dual vision.Livebearer · Rivers and lakes · 1758
🇲🇽 MexicoButterfly splitfin
A critically endangered livebearing fish from Mexico.Livebearer · Rivers and lakes · 1971
WorldTetra
Common name for small freshwater characiform fishes popular in aquaria.Livebearer · Rivers and lakes
🇺🇸 United States and 2 morePupfish
Small killifish known for surviving in extreme isolated waters.Livebearer · Rivers and lakes
🇵🇪 Peru and 1 moreTiticaca orestias
Largest killifish of Lake Titicaca, likely extinct.Livebearer · Rivers and lakes
WorldAphyosemion
A large genus of small African killifish kept in home aquariums.Livebearer · Rivers and lakes
🇲🇽 Mexico and 3 moreXiphophorus
A genus of small livebearing fish native to Mexico and Central America, known for aquarium use and genetic research.Livebearer · Rivers and lakes
WorldKillifish
Small egg-laying fish known for hardiness and short lifespansLivebearer · Rivers and lakes
🇺🇸 United StatesLeast killifish
A tiny North American fish that gives birth to live young and measures just two centimetres long.Livebearer · Rivers and lakes
🇺🇸 United States and 4 moreMosquitofish
Small North American fish introduced globally for mosquito control.Livebearer · Rivers and lakes
🇺🇸 United StatesEastern mosquitofish
A small livebearing fish native to the eastern US, now invasive in many regions.Livebearer · Rivers and lakes · 1859
🇧🇷 Brazil and 1 moreLargescale four-eyes
Surface-dwelling fish with split eyes for dual vision.Livebearer · Rivers and lakes · 1758
🇲🇽 MexicoButterfly splitfin
A critically endangered livebearing fish from Mexico.Livebearer · Rivers and lakes · 1971
WorldTetra
Common name for small freshwater characiform fishes popular in aquaria.Livebearer · Rivers and lakes
Photo credits on this page
The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.
- Pupfish: P.V. Loiselle, CC BY-SA 3.0, source
- Aphyosemion: Violaine2, CC BY 3.0, source
- Xiphophorus: Marrabbio2, CC BY-SA 3.0, source
- Killifish: TinoStrauss, CC BY-SA 3.0, source
- Least killifish: Brian Gratwicke, CC BY 2.0, source
- Mosquitofish: NOZO, CC BY-SA 3.0, source
- Eastern mosquitofish: JeffreyGammon, CC BY-SA 4.0, source
- Largescale four-eyes: Michael Gäbler, CC BY 3.0, source
- Butterfly splitfin: Przemysław Malkowski, CC BY-SA 3.0, source
- Tetra: Holger Krisp, CC BY 3.0, source