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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 OceanEckerd College professor contributes to designating Biscayne Bay an Important Shark and Ray Area SpeciesRio Verde Grande Survey Identifies Fifty-Three Fish Species Facing Flow Reductions FisheriesAdams River Salmon Run in Thompson-Nicola IndiaHilsa production dropped 26% in five years, fisheries minister tells parliament 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 OceanEckerd College professor contributes to designating Biscayne Bay an Important Shark and Ray Area SpeciesRio Verde Grande Survey Identifies Fifty-Three Fish Species Facing Flow Reductions FisheriesAdams River Salmon Run in Thompson-Nicola IndiaHilsa production dropped 26% in five years, fisheries minister tells parliament

EveryFish

All fish

866 fish so far, best known first. 309 more are on the list to be written.

#A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

🇺🇸 United States and 2 morePupfish Small killifish known for surviving in extreme isolated waters.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

🇧🇷 Brazil and 1 moreLargescale four-eyes Surface-dwelling fish with split eyes for dual vision.Livebearer · Rivers and lakes · 1758

🇲🇽 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 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

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
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
Largescale four-eyes: Michael Gäbler, CC BY 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
Green swordtail: Bastet78, CC BY-SA 3.0, source
Guppy: Wibowo Djatmiko ( Wie146 ), CC BY-SA 3.0, source

The weekly digest

Every Monday: the fish of the day, new pages on EveryFish, and the conferences and anniversaries of the week ahead.