News
RiversEl Niño seen disrupting fish migration patternsSpeciesScientists Discover Mysterious New Fish in the Red Sea – and Have Never Seen It AgainOceanEye to eye with Britain's hidden sharks at SharkAdemy - OceanographicRiversIn October, biologists surveying a New York harbor for invasive fish pulled up a bright yellow one. It wasn't an invasive species at allOceanShedd Aquarium Sends Shark Eggs to Bolster Wild PopulationsSpeciesA 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 ConservationOceanEckerd College professor contributes to designating Biscayne Bay an Important Shark and Ray AreaSpeciesRio Verde Grande Survey Identifies Fifty-Three Fish Species Facing Flow ReductionsFisheriesAdams River Salmon Run in Thompson-NicolaRiversEl Niño seen disrupting fish migration patternsSpeciesScientists Discover Mysterious New Fish in the Red Sea – and Have Never Seen It AgainOceanEye to eye with Britain's hidden sharks at SharkAdemy - OceanographicRiversIn October, biologists surveying a New York harbor for invasive fish pulled up a bright yellow one. It wasn't an invasive species at allOceanShedd Aquarium Sends Shark Eggs to Bolster Wild PopulationsSpeciesA 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 ConservationOceanEckerd College professor contributes to designating Biscayne Bay an Important Shark and Ray AreaSpeciesRio Verde Grande Survey Identifies Fifty-Three Fish Species Facing Flow ReductionsFisheriesAdams River Salmon Run in Thompson-Nicola
EveryFish

Least concern

Widespread and not thought to be at risk. 286 fish on EveryFish so far.

Least Concern is the IUCN Red List category for species that have been assessed and are not close to qualifying as threatened. They are usually widespread and abundant. Many important food fish are in this category, including hilsa, rohu, skipjack tuna and Atlantic herring. Least Concern describes a species as a whole, worldwide; it does not mean that every local stock is healthy or well managed.

Common, not always safe

A fish can be Least Concern globally while particular populations are in trouble. Hilsa is widespread across the Bay of Bengal and its rivers, but its runs up the Ganges collapsed after the Farakka Barrage. Rohu and catla are abundant because they are farmed in huge numbers, while wild river stocks have declined. Herring stocks have crashed and recovered in different seas over the past century. Fisheries are managed stock by stock, so local assessments matter as much as the global category.

Back from the brink

Some fish have moved into Least Concern after recovering. The Atlantic bluefin tuna was listed as Endangered in 2011 after decades of overfishing; strict quotas set by the Atlantic tuna commission, ICCAT, and better enforcement let stocks recover, and in 2021 it was reassessed as Least Concern. Yellowfin tuna was moved from Near Threatened to Least Concern in the same update, though scientists warn that yellowfin in the Indian Ocean is still overfished.

Famous least concern fish

IlishLeast Concern globally, though local runs have fallenRohuAbundant thanks to farmingCatlaWidespread in farms and riversIndian mackerelA common schooling fish of the Indo-PacificSkipjack tunaThe most caught tunaAtlantic bluefin tunaMoved from Endangered to Least Concern in 2021Yellowfin tunaMoved to Least Concern in 2021Atlantic herringWidespread in the North Atlantic

Further reading

GroupSharkRayCarpCatfishSalmonidHerringCodTunaPerch-likeCichlidReef fishEelFlatfishLivebearerAncientOther
WaterRivers and lakesEstuaries and mangrovesCoasts and shelvesCoral reefsOpen oceanDeep seaPolar and cold seasCaves and springsBetween sea and river
UseFood fishFarmedAquarium fishSport fishingCulture and faithVenomous or dangerousInvasiveScience and research
OrderBest knownA to ZOldest firstNewest firstBy size
🇧🇴 Bolivia and 4 moreRipsaw catfish Large thorny catfish native to South American rivers.Catfish · Rivers and lakes 🇧🇷 Brazil and 2 morePygmy corydoras A tiny armored catfish from South America kept in community aquariums.Catfish · Rivers and lakes · 1966 🇧🇷 Brazil and 1 moreAncistrus A genus of small, nocturnal freshwater catfish native to South America and Panama.Catfish · Rivers and lakes Southeast AsiaSiamese algae-eater A bottom-dwelling freshwater fish from Southeast Asia known for eating red algae in aquariums.Carp · Rivers and lakes Southeast AsiaClown barb A spotted freshwater fish from Borneo and Sumatra.Carp · Rivers and lakes 🇮🇩 IndonesiaChili rasbora Tiny red and black fish from Borneo swamps kept in aquariums.Other · Rivers and lakes 🇲🇲 Myanmar and 1 moreCelestial pearl danio A tiny, brightly coloured freshwater fish from Myanmar and Thailand, popular in the aquarium trade.Carp · Rivers and lakes · 2006 🇮🇩 IndonesiaKuhli loach A slender, nocturnal freshwater fish from Southeast Asia popular in aquariums.Other · Rivers and lakes · 1846 🇹🇭 Thailand and 4 moreTinfoil barb A large Southeast Asian freshwater fish known for its red fins and silvery body.Carp · Rivers and lakes · 1853 🇯🇵 JapanKoi Ornamental carp varieties bred in Japan for decorative ponds.Carp · Rivers and lakes 🇨🇳 ChinaGoldfish A domesticated freshwater carp from China, kept worldwide as a pet and aquarium fish.Carp · Rivers and lakes 🇺🇸 United States and 1 moreAtlantic stingray Small stingray found in Atlantic coastal waters and fresh rivers.Ray · Rivers and lakes · 1824 🇧🇷 Brazil and 1 moreOcellate river stingray A widespread freshwater stingray from South America known for its spotted disc and popularity in large aquaria.Ray · Rivers and lakes WorldArcherfish Tropical fish family that shoots water jets to catch prey from above the surface.Other · Rivers and lakes · 1767 🇮🇳 IndiaGangetic leaffish A small Asian fish found in slow rivers and ponds across South Asia.Other · Rivers and lakes 🇻🇪 Venezuela and 4 moreGuppy Small tropical livebearer known for bright male colours and rapid reproduction.Livebearer · Rivers and lakes · 1859 🇮🇩 Indonesia and 4 moreWalking catfish A Southeast Asian air-breathing catfish known for moving across land and surviving out of water.Catfish · Rivers and lakes 🇹🇭 Thailand and 4 moreClown featherback Large tropical freshwater fish with a knife-shaped body and spotted pattern.Other · Rivers and lakes 🇸🇪 Sweden and 3 moreIde A freshwater cyprinid native to Europe and Asia, widely kept in ornamental ponds.Carp · Rivers and lakes · 1758 Sub-Saharan AfricaMany-banded shell dweller Tiny cichlid from Lake Tanganyika that lives in snail shellsCichlid · Rivers and lakes 🇻🇪 Venezuela and 3 moreBlack ghost knifefish Nocturnal electric fish from South American riversOther · Rivers and lakes · 1766 🇮🇩 Indonesia and 4 moreGourami A family of freshwater labyrinth fish native to Asia, known for their air-breathing organ and varied parental care.Other · Rivers and lakes · 1832 🇦🇺 AustraliaGulf saratoga A large, pearly-scaled freshwater fish from northern Australia and New Guinea.Other · Rivers and lakes 🇿🇦 South Africa and 4 moreMozambique tilapia A hardy cichlid from southeastern Africa, now farmed globally and listed as a major invasive species.Cichlid · Rivers and lakes 🇮🇳 India and 1 moreMalabar danio A small, striped freshwater fish from India and Sri Lanka.Other · Rivers and lakes · 1849 🇮🇳 India and 4 moreZig-zag eel A large freshwater spiny eel native to South and Southeast Asia, known for its zigzag pattern and predatory habits.Eel · Rivers and lakes · 1777 🇬🇧 United Kingdom and 4 moreCrucian carp A European cyprinid known for surviving winter ice by converting lactate to ethanol.Carp · Rivers and lakes 🇮🇩 Indonesia and 4 moreGiant gourami A large freshwater fish from Southeast Asia valued for food and kept in aquaria.Other · Rivers and lakes 🇺🇸 United States and 1 moreStriped bass Anadromous marine fish native to the Atlantic coast of North America, known for sport fishing and culinary use.Other · Rivers and lakes 🇺🇸 United States and 1 moreAlligator gar A large, primitive freshwater fish native to North America known for its armored scales and air-breathing ability.Other · Rivers and lakes · 1803 🇨🇩 Democratic Republic of the CongoGoliath tigerfish A massive freshwater predator from the Congo River Basin known for its size and sharp teeth.Other · Rivers and lakes · 1898 WorldCatfish A diverse order of ray-finned fish known for whisker-like barbels and lack of scales.Catfish · Rivers and lakes 🇦🇺 Australia and 2 moreCommon carp A widespread freshwater fish native to Europe and Asia, now farmed globally and often invasive.Carp · Rivers and lakes WorldTilapia Common name for nearly a hundred species of cichlid fish native to Africa and the Middle East.Cichlid · Rivers and lakes · 1840 🇹🇭 Thailand and 3 moreSnakeskin gourami A large Southeast Asian freshwater fish known for its striped pattern and air-breathing ability.Other · Rivers and lakes
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