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Freshwater Fish Species
All freshwater fish species found in rivers, lakes, streams, and ponds worldwide. From tiny tetras to the giant arapaima — covering every continent.
18,067
Total Species
1,926
Endangered (EN+CR)
1,910
Edible Species
204
Families
Odontostilbe Stenodon
Odontostilbe stenodon
Characidae
Odontostilbe Weitzmani
Odontostilbe weitzmani
Characidae
Least Concern
Odontostoechus Lethostigmus
Odontostoechus lethostigmus
Ogilby's rainbowfish
Melanotaenia ogilbyi
Melanotaeniidae
Vulnerable
Ogun mormyrid
Marcusenius brucii
Mormyridae
Data Deficient
Ohio lamprey
Ichthyomyzon bdellium
Petromyzontidae
Least Concern
Ohrid gudgeon
Gobio ohridanus
Gobionidae
Endangered
Ohrid minnow
Pelasgus minutus
Cyprinidae
Vulnerable
Ohrid trout
Salmo letnica
Salmonidae
Endangered
Edible
Oibita catfish
Callichthys oibaensis
Callichthyidae
Near Threatened
Oily bitterling
Tanakia limbata
Cyprinidae
Least Concern
Okaloosa darter
Etheostoma okaloosae
Percidae
Least Concern
Okavango robber
Rhabdalestes maunensis
Alestidae
Least Concern
Edible
Okavango suckermouth
Chiloglanis fasciatus
Mochokidae
Least Concern
Okavango tilapia
Tilapia ruweti
Cichlidae
Least Concern
Edible
Okefenokee pygmy sunfish
Elassoma okefenokee
Elassomatidae
Least Concern
Oktedi rainbowfish
Melanotaenia oktediensis
Melanotaeniidae
Critically Endangered
Edible
Okumus trout
Salmo okumusi
Salmonidae
Olga cory
Corydoras simulatus
Callichthyidae
Vulnerable
Oligobrycon Microstomus
Oligobrycon microstomus
Data Deficient
Oligosarcus Acutirostris
Oligosarcus acutirostris
Acestrorhamphidae
Least Concern
Oligosarcus Amome
Oligosarcus amome
Acestrorhamphidae
Oligosarcus Argenteus
Oligosarcus argenteus
Acestrorhamphidae
Least Concern
Oligosarcus Bolivianus
Oligosarcus bolivianus
Acestrorhamphidae
Least Concern
Oligosarcus Brevioris
Oligosarcus brevioris
Acestrorhamphidae
Least Concern
Oligosarcus Hepsetus
Oligosarcus hepsetus
Acestrorhamphidae
Least Concern
Oligosarcus Itau
Oligosarcus itau
Acestrorhamphidae
Endangered
Oligosarcus Jacuiensis
Oligosarcus jacuiensis
Acestrorhamphidae
Least Concern
Oligosarcus Jenynsii
Oligosarcus jenynsii
Acestrorhamphidae
Least Concern
Edible
Oligosarcus Longirostris
Oligosarcus longirostris
Acestrorhamphidae
Least Concern
Oligosarcus Macrolepis
Oligosarcus macrolepis
Acestrorhamphidae
Least Concern
Oligosarcus Menezesi
Oligosarcus menezesi
Acestrorhamphidae
Near Threatened
Oligosarcus Oligolepis
Oligosarcus oligolepis
Acestrorhamphidae
Least Concern
Oligosarcus Paranensis
Oligosarcus paranensis
Acestrorhamphidae
Least Concern
Oligosarcus Perdido
Oligosarcus perdido
Acestrorhamphidae
Least Concern
Oligosarcus Planaltinae
Oligosarcus planaltinae
Acestrorhamphidae
Least Concern
Oligosarcus Platensis
Oligosarcus platensis
Acestrorhamphidae
Oligosarcus Robustus
Oligosarcus robustus
Acestrorhamphidae
Least Concern
Oligosarcus Varii
Oligosarcus varii
Acestrorhamphidae
Olivaichthys Cuyanus
Olivaichthys cuyanus
Diplomystidae
Olivaichthys Mesembrinus
Olivaichthys mesembrinus
Diplomystidae
Olive barb
Systomus sarana
Cyprinidae
Least Concern
Olive cory
Hoplisoma ehrhardti
Least Concern
Olive cory
Corydoras ehrhardti
Callichthyidae
Least Concern
Olive darter
Percina squamata
Percidae
Near Threatened
Olive skiffia
Skiffia lermae
Goodeidae
Endangered
Olivegreen ufipa barb
Enteromius olivaceus
Cyprinidae
Least Concern
Olmec blind catfish
Rhamdia macuspanensis
Heptapteridae
Near Threatened