There are several unique species that inhabit the many rivers of the world. Discover some of them here!

Animal List

North America
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Lake Sturgeon (Acipenser fulvescens)
Sauger (Sander canadensis)
Walleye (Sander vitreus)
Sockeye Salmon (Oceanic Form) (Oncorhynchus nerka)
Kokanee Salmon (Breeding Form) (Oncorhynchus nerka)
American Eel (Anguilla rostrata)
American Pickerel (Esox americanus)
Pirate Perch (Aphredoderus sayanus)
Green Sunfish (Lepomis cyanellus)
Tiger Muskellunge (Esox lucius × Esox masquinongy)
Shortnose Gar (Lepisosteus platostomus)
Freshwater Drum (Aplodinotus grunniens)
Lake Trout (Salvelinus namaycush)
Tadpole Madtom (Noturus gyrinus)
Razorback Sucker (Xyrauchen texanus)
Humpback Chub (Gila cypha)
Machaca (Brycon guatemalensis)
Dogtooth Rivulus (Cynodonichthys tenuis)
American Mink (Neovison vison)
Muskrat (Ondatra zibethicus)
Northern Water Snake (Nerodia sipedon)
Spiny Softshell Turtle (Apalone spinifera)
Hellbender (Cryptobranchus alleganiensis)
Rusty Crayfish (Faxonius rusticus)
Zebra Mussel (Dreissena polymorpha)
Giant Water Bug (Lethocerus americanus)
Eastern Toe Biter (Benacus griseus)
American White Pelican (Pelecanus erythrorhynchos)
Hooded Mersanger (Lophodytes cucullatus)
Ruddy Duck (Oxyura jamaicensis)
Great Egret (Ardea alba)
Great Blue Heron (Ardea herodias)
Anhinga (Anhinga anhinga)
Common Loon (Gavia cortle)
Boat-billed Heron (Cochlearius cochlearius)
Green Heron (Butorides virescens)

Queen Watersnake (Regina septemvittata)
Chain Pickerel (Esox ♥♥♥♥♥)
Piebald Madtom (Noturus gladiator)
Stonecat (Noturus flavus)
Hogchoker (Trinectes maculatus)
Blackstripe Topminnow (Fundulus notatus)
Rainbow Shiner (Notropis chrosomus)
Ironcolor Shiner (Notropis chalybaeus)
Common Logperch (Percina caprodes)
Tangerine Darter (Percina aurantiaca)
Torrent Sucker (Thoburnia rhothoeca)
Central Stoneroller (Campostoma anomalum)
Sunburst Diving Beetle (Thermonectus marmoratus)

South America
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Amazon River Dolphin (Inia geoffrensis)
Black Tailed Payara (Hydrolycus armatus)
Dorado (Salminus brasiliensis)
Firewood Catfish (Sorubimichthys planiceps)
Giant Otter (Pteronura brasiliensis)
Piraiba Catfish (Brachyplatystoma filamentosum)
South American Lungfish (Lepidosiren paradoxa)
Wattled Jacana (Jacana jacana)
White-faced Whistling Duck (Dendrocygna viduata)
Rio Cauca Caecilian (Typhlonectes natans)

Europe
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Russian Desman (Desmana moschata)
White-Throated Dipper (Cinclus cinclus)
Dice Snake (Natrix tessellata)
Edible Frog (Pelophylax kl. esculentus)
Adriatic Sturgeon (Acipenser naccarii)
Zander (Sander lucioperca)
Aristotle's Catfish (Silurus aristotelis)
Asp (Leuciscus aspius)
Softmouth Trout (Salmo obtusirostris)
Common Nase (Chondrostoma nasus)
European Bullhead (Cottus gobio)
Freshwater Blenny (Salaria fluviatilis)
European Freshwater Crab (Potamon fluviatile)
Great Diving Beetle (Dytiscus marginalis)

Africa
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Common Hippopotamus (Hippopotamus amphibius)
Pygmy Hippopotamus (Choeropsis liberiensis)
Goliath Heron (Ardea goliath)
African Side-Necked Turtle (Pelusios castaneus)
African Clawed Frog (Xenopus laevis)
African Tigerfish (Hydrocynus vittatus)
Cuckoo Catfish (Synodontis petricola)
Six Banded Distichodus (Distichodus sexfasciatus)
Marbled Lungfish (Protopterus aethiopicus)
Zambezi Parrotfish (Cyphomyrus discorhynchus)
Slender Robber (Rhabdalestes rhodesiensis)
Mokele-mbembe Bichir (Polypterus mokelembembe)
Blue Spotted Tilapia (Oreochromis leucostictus)
Natal River Crab (Potamonautes sidneyi)

Vundu (Heterobranchus longifilis)
African Sharptooth Catfish (Clarias gariepinus)
Oneline Tetra (Nannaethiops unitaeniatus)
Banded Jewelfish (Hemichromis fasciatus)
Grass-Eater (Distichodus rostratus)
Mozambique Tilapia (Oreochromis mossambicus)
Nothobranchius virgatus

Asia
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Fishing Cat (Prionailurus viverrinus)

Crab-eating Mongoose (Herpestes urva)
Baikal Teal (Sibirionetta formosa)
Chinese Warty Newt (Paramesotriton chinensis)
Sakhalin Sturgeon (Acipenser mikadoi)
Sharp-Snouted Lenok (Brachymystax lenok)
Predatory Carp (Chanodichthys erythropterus)
Barbel Steed (Hemibarbus labeo)
Amur Sleeper (Perccottus glenii)
Ice Goby (Leucopsarion petersii)
Japanese Eel (Anguilla japonica)
Bronze Featherback (Notopterus notopterus)
Abei Freshwater Puffer (Pao abei)
Elephant Ear Gourami (Osphronemus exodon)
Blyth's Loach (Syncrossus berdmorei)
Siamese Bat Catfish (Oreoglanis siamensis)
Japanese Crayfish (Cambaroides japonicus)

Smooth Coated Otter (Lutrogale perspicillata)
Watercock (Gallicrex cinerea)
Indian Bullfrog (Hoplobatrachus tigerinus)
Ganges Shark (Glyphis gangeticus)
Highland Giant Goonch (Bagarius bagarius)
Deccan Masheer (Tor khudree)
Melon Barb (Haludaria fasciata)
Glowlight Danio (Danio choprae)
Honey Gourami (Trichogaster chuna)
Vatani Rohtee (Rohtee ogilbii)
Slender Rasbora (Rasbora daniconius)
Gangetic Leaffish (Nandus nandus)
Yoyo Loach (Botia almorhae)
Malaysian Trumpet Snail (Melanoides tuberculata)


Oceania
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Rakali (Hydromys chrysogaster)
Austrailian Shelduck (Tadorna tadornoides)
Freshwater Crocodile (Crocodylus johnsoni)
Giant Barred Frog (Mixophyes iteratus)
Giant Kōkopu (Galaxias argenteus)
Eastern Freshwater Cod (Maccullochella ikei)
Macquarie Perch (Macquaria australasica)
Black Stripe Minnow (Galaxiella nigrostriata)
Fly River Rainbowfish (Melanotaenia sexlineata)
Salmon Catfish (Sciades leptaspis)
Fly-Speckled Hardyhead ( Craterocephalus stercusmuscarum)
Murray Crayfish (Euastacus armatus)

Lorentz' Rainbowfish (Chilatherina lorentzii)
Crazy Fish (Butis butis)
Berney's Catfish (Neoarius berneyi)
Samurai Pufferfish (Tetraodon erythrotaenia)
Spot-fin Beachsalmon (Leptobrama muelleri)
Beach Stone-Curlew (Esacus magnirostris)