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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

🇵🇾 Fish of Paraguay

6 fish from Paraguay, best known first.

Reef or sea River or lake Fishing harbour Fish market Aquarium or research City

🇦🇷 Argentina and 4 moreArgentinian silverside A large, adaptable silverside native to South America.Other · Rivers and lakes

🇧🇷 Brazil and 2 moreBlack tetra Small freshwater characin with dark vertical barsOther · Rivers and lakes 🇧🇷 Brazil and 4 moreSerpae tetra Small red freshwater fish from South AmericaOther · Rivers and lakes · 1882

🇵🇾 Paraguay and 3 moreBuenos Aires tetra Hardy silver freshwater fish with red fins and a black tail mark.Other · Rivers and lakes · 1907

🇧🇷 Brazil and 4 moreGolden dorado A large predatory freshwater fish native to South America known for its golden colour.Other · Rivers and lakes

🇧🇷 Brazil and 3 moreFlag cichlid A South American cichlid from river basins in Brazil and Bolivia.Cichlid · Rivers and lakes

Photo credits on this page

The small pictures above come from Wikimedia Commons under free licences. Some are cropped to fit.

Buenos Aires tetra: Mattia Nocciola, CC BY-SA 4.0, source
Golden dorado: David Morimoto (treez44est), CC BY-SA 2.0, source
Argentinian silverside: CHUCAO, CC BY-SA 3.0, source
Black tetra: emptyvi, CC BY-SA 3.0, source
Flag cichlid: Citron, 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.