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OceanSouth Korea’s Celebrity Shark Raises Bigger Questions About Climate Change And Ocean Conservation IndiaFrom pickles to fish farming: 3 farmers show how innovation can transform agriculture RiversEl Niño seen disrupting fish migration patterns SpeciesScientists Discover Mysterious New Fish in the Red Sea – and Have Never Seen It Again OceanEye to eye with Britain's hidden sharks at SharkAdemy - Oceanographic RiversIn October, biologists surveying a New York harbor for invasive fish pulled up a bright yellow one. It wasn't an invasive species at all OceanShedd Aquarium Sends Shark Eggs to Bolster Wild Populations SpeciesA rare fish has been found in Lake Ontario, North America, whose entire body is golden. It is a nati..OceanThe Great Sea Reef Is Fiji’s Wildest Dive, and a New Frontier for Conservation FisheriesPrince William Sound reports lowest pink salmon harvest since the late 1970s OceanSouth Korea’s Celebrity Shark Raises Bigger Questions About Climate Change And Ocean Conservation IndiaFrom pickles to fish farming: 3 farmers show how innovation can transform agriculture RiversEl Niño seen disrupting fish migration patterns SpeciesScientists Discover Mysterious New Fish in the Red Sea – and Have Never Seen It Again OceanEye to eye with Britain's hidden sharks at SharkAdemy - Oceanographic RiversIn October, biologists surveying a New York harbor for invasive fish pulled up a bright yellow one. It wasn't an invasive species at all OceanShedd Aquarium Sends Shark Eggs to Bolster Wild Populations SpeciesA rare fish has been found in Lake Ontario, North America, whose entire body is golden. It is a nati..OceanThe Great Sea Reef Is Fiji’s Wildest Dive, and a New Frontier for Conservation FisheriesPrince William Sound reports lowest pink salmon harvest since the late 1970s

EveryFish

Small: 5 to 20 cm

Sardines, anchovies, most aquarium fish and many reef fish. 175 fish.

Tiny Small Medium Large Very large Giant

🇹🇭 Thailand and 4 moreSiamese fighting fish A small, colorful freshwater fish native to Southeast Asia, famous as a pet and for male aggression.Livebearer · Rivers and lakes · 1910

🇲🇽 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

🇲🇽 MexicoButterfly splitfin A critically endangered livebearing fish from Mexico.Livebearer · Rivers and lakes · 1971 🇲🇿 MozambiqueBluefin notho A small annual killifish from Mozambique kept in aquaria.Livebearer · Rivers and lakes · 1926

🇬🇦 GabonLyretail panchax Small colourful freshwater killifish from GabonLivebearer · Rivers and lakes

🇳🇬 Nigeria and 1 moreBlue lyretail A colourful West African killifish kept in home aquariums.Livebearer · Rivers and lakes · 1911

🇲🇽 Mexico and 2 moreMexican molly Small livebearing fish from Mexico and Central America.Livebearer · Rivers and lakes

🇺🇸 United States and 1 moreSailfin molly Small livebearing fish with a large dorsal fin in males.Livebearer · Rivers and lakes · 1821

🇲🇽 Mexico and 1 moreSouthern platyfish Small live-bearing freshwater fish from Central AmericaLivebearer · Rivers and lakes

🇲🇽 MexicoVariable platyfish Small livebearing fish from Mexico popular in home aquariumsLivebearer · Rivers and lakes

🇲🇽 Mexico and 1 moreGreen swordtail A hardy live-bearing fish popular in home aquariums.Livebearer · Rivers and lakes · 1848

🇻🇪 Venezuela and 4 moreGuppy Small tropical livebearer known for bright male colours and rapid reproduction.Livebearer · Rivers and lakes · 1859 🇺🇸 United StatesFlagfish Small Florida pupfish with a US flag patternLivebearer · Rivers and lakes · 1879

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
Xiphophorus: Marrabbio2, CC BY-SA 3.0, source
Killifish: TinoStrauss, CC BY-SA 3.0, source
Butterfly splitfin: Przemysław Malkowski, CC BY-SA 3.0, source
Lyretail panchax: Alexander Prokoshev, CC BY-SA 3.0, source
Blue lyretail: Violaine2, France, 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
Southern platyfish: Photograph by Jere Kyyrö. Uploaded by Rasvis ., CC BY-SA 3.0, source
Green swordtail: Bastet78, CC BY-SA 3.0, source
Guppy: Wibowo Djatmiko ( Wie146 ), CC BY-SA 3.0, source

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