Small: 5 to 20 cm
Sardines, anchovies, most aquarium fish and many reef fish. 175 fish.
GroupSharkRayCarpCatfishSalmonidHerringCodTunaPerch-likeCichlidReef fishEelFlatfishLivebearerAncientOther
WaterRivers and lakesEstuaries and mangrovesCoasts and shelvesCoral reefsOpen oceanDeep seaPolar and cold seasCaves and springsBetween sea and river
🇺🇸 United States and 4 moreMosquitofish
Small North American fish introduced globally for mosquito control.Livebearer · Rivers and lakes
🇲🇽 Mexico and 2 moreMexican molly
Small livebearing fish from Mexico and Central America.Livebearer · Rivers and lakes
🇧🇷 Brazil and 1 moreAncistrus
A genus of small, nocturnal freshwater catfish native to South America and Panama.Catfish · Rivers and lakes
WorldGuntea loach
A small Asian loach that breathes through its gut to survive in poor water.Other · Rivers and lakes
🇻🇪 Venezuela and 4 moreGuppy
Small tropical livebearer known for bright male colours and rapid reproduction.Livebearer · Rivers and lakes · 1859
🇵🇰 PakistanElongate glassy perchlet
Small translucent fish from South Asian watersOther · Rivers and lakes
🇳🇿 New Zealand and 3 moreCommon galaxias
A small migratory fish of the Southern Hemisphere.Other · Rivers and lakes
Photo credits on this page
The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.
- Siamese fighting fish: Henryk Niestrój, CC BY 4.0, source
- Zebra loach: Lerdsuwa, CC BY-SA 3.0, source
- Silver cyprinid: Boulenger, George Albert; Loat, L., Public domain, source
- Hingemouth: George Albert Boulenger, Public domain, source
- Mosquitofish: NOZO, CC BY-SA 3.0, source
- Three spot gourami: Gourami Watcher, CC BY-SA 3.0, source
- Mexican molly: Taken by Darkmax, CC BY-SA 3.0, source
- Sailfin molly: (c) Nick Tobler (Cowturtle), some rights reserved (CC BY), CC BY 4.0, source
- Ancistrus: Unknown author, CC BY-SA 3.0, source
- Fathead minnow: Rankin1958, CC BY-SA 3.0, source
- Guntea loach: Sir Francis Day, Public domain, source
- Swamp barb: AravindManoj, CC BY-SA 4.0, source
- Dwarf gourami: Unknown author, Public domain, source
- Guppy: Wibowo Djatmiko ( Wie146 ), CC BY-SA 3.0, source
- Elongate glassy perchlet: Captain R C Beavan, Public domain, source
- Common galaxias: Lycaon.cl, CC BY-SA 3.0, source
- Lake Tanganyika sardine: Zimrh, CC BY-SA 3.0, source
- Kapenta: Emesik, CC BY-SA 3.0, source