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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
Macedonia shad
Alosa macedonica
Alosidae
Critically Endangered
Macrognathus Pentophthalmos
Macrognathus pentophthalmos
Mastacembelidae
Critically Endangered
Madhava's stream loach
Schistura madhavai
Nemacheilidae
Critically Endangered
Maravatío shiner
Aztecula marhabatiensis
Critically Endangered
Marbled Darter
Etheostoma marmorpinnum
Percidae
Critically Endangered
Marbled pearlfish
Leptolebias marmoratus
Rivulidae
Critically Endangered
Marqīyah Spring Minnow
Pseudophoxinus hasani
Cyprinidae
Critically Endangered
Masked julie
Julidochromis transcriptus
Cichlidae
Critically Endangered
Edible
Matilebias Toba
Matilebias toba
Critically Endangered
Maylandia Usisyae
Maylandia usisyae
Cichlidae
Critically Endangered
Mbuta Rainbowfish
Pelangia mbutaensis
Melanotaeniidae
Critically Endangered
McDowall's Galaxias
Galaxias mcdowalli
Galaxiidae
Critically Endangered
Mchenga Conophoros
Mchenga conophoros
Cichlidae
Critically Endangered
Megadontognathus Cuyuniensis
Megadontognathus cuyuniensis
Apteronotidae
Critically Endangered
Mekong giant catfish
Pangasianodon gigas
Pangasiidae
Critically Endangered
Edible
Melanocharacidium Blennioides
Melanocharacidium blennioides
Crenuchidae
Critically Endangered
Melanochromis Chipokae
Melanochromis chipokae
Cichlidae
Critically Endangered
Melanochromis Lepidiadaptes
Melanochromis lepidiadaptes
Cichlidae
Critically Endangered
Melanorivulus Egens
Melanorivulus egens
Rivulidae
Critically Endangered
Melanorivulus Imperatrizensis
Melanorivulus imperatrizensis
Rivulidae
Critically Endangered
Menderes brook minnow
Pseudophoxinus maeandricus
Cyprinidae
Critically Endangered
Mesonoemacheilus Herrei
Mesonoemacheilus herrei
Critically Endangered
Mesopotamian barbel
Luciobarbus subquincunciatus
Cyprinidae
Critically Endangered
Mexican lamprey
Tetrapleurodon spadiceus
Critically Endangered
Microglanis Robustus
Microglanis robustus
Pseudopimelodidae
Critically Endangered
Milyeringa Justitia
Milyeringa justitia
Eleotridae
Critically Endangered
Miragoane gambusia
Gambusia beebei
Poeciliidae
Critically Endangered
Miragoane limia
Limia miragoanensis
Poeciliidae
Critically Endangered
Moapa dace
Gila coriacea
Cyprinidae
Critically Endangered
Mogurnda Aiwasoensis
Mogurnda aiwasoensis
Eleotridae
Critically Endangered
Mogurnda Kaimana
Mogurnda kaimana
Eleotridae
Critically Endangered
Mogurnda Maccuneae
Mogurnda maccuneae
Eleotridae
Critically Endangered
Mogurnda Mbuta
Mogurnda mbuta
Eleotridae
Critically Endangered
Mongo
Stomatepia mongo
Cichlidae
Critically Endangered
Mosa Mogurnda
Mogurnda mosa
Eleotridae
Critically Endangered
Mountain catfish
Nematogenys inermis
Nematogenyidae
Critically Endangered
Mountain danio
Devario monticola
Cyprinidae
Critically Endangered
Mugilogobius Amadi
Mugilogobius amadi
Gobiidae
Critically Endangered
Murray hardyhead
Craterocephalus fluviatilis
Atherinidae
Critically Endangered
Myaka
Myaka myaka
Cichlidae
Critically Endangered
Naked characin
Gymnocharacinus bergii
Critically Endangered
Nematolebias Catimbau
Nematolebias catimbau
Rivulidae
Critically Endangered
Nematolebias Papilliferus
Nematolebias papilliferus
Rivulidae
Critically Endangered
Neocottus Thermalis
Neocottus thermalis
Critically Endangered
Neofundulus Acutirostratus
Neofundulus acutirostratus
Rivulidae
Critically Endangered
Neoplecostomus Botucatu
Neoplecostomus botucatu
Loricariidae
Critically Endangered
Neoplecostomus Watersi
Neoplecostomus watersi
Loricariidae
Critically Endangered
Neostethus Ctenophorus
Neostethus ctenophorus
Phallostethidae
Critically Endangered