Freshwater aquarium fish: R
All freshwater fish whose common name starts with R, in alphabetical order. Each card links to its care guide.
146 species and 2 varieties
Railway barb
Acrossocheilus fasciatus
Freshwater7.5 in (19 cm) · 79 gal (300 L)61–75°F (16–24°C)
Rainbow belly pipefish
Microphis deocata
Freshwater5.9 in (15 cm) · 20 gal (75 L)77–82°F (25–28°C)
Rainbow bitterling
Acheilognathus macropterus
Freshwater10.6 in (27 cm) · 106 gal (400 L)57–79°F (14–26°C)
Rainbow cichlid
Herotilapia multispinosa
Freshwater6.3 in (16 cm) · 26 gal (100 L)72–82°F (22–28°C)
Rainbow darter
Etheostoma caeruleum
Freshwater2.8 in (7 cm) · 25 gal (95 L)50–64°F (10–18°C)
Rainbow emperor tetra
Nematobrycon lacortei
Freshwater2 in (5 cm) · 20 gal (75 L)73–81°F (23–27°C)
Rainbow goodeid
Characodon lateralis
Freshwater2.4 in (6 cm) · 15 gal (57 L)61–75°F (16–24°C)
Rainbow gudgeon
Sarcocheilichthys nigripinnis
Freshwater6.3 in (16 cm) · 53 gal (200 L)57–75°F (14–24°C)
Rainbow shark
Epalzeorhynchos frenatum
Freshwater5.9 in (15 cm) · 32 gal (120 L)68–79°F (20–26°C)1 variety
Rainbow shiner
Notropis chrosomus
Freshwater3.1 in (8 cm) · 20 gal (75 L)50–72°F (10–22°C)
Rainbow sicyopus
Sicyopus auxilimentus
Freshwater1.4 in (3.5 cm) · 14 gal (54 L)73–81°F (23–27°C)
Rainbow snakehead
Channa bleheri
Freshwater7.9 in (20 cm) · 42 gal (160 L)59–77°F (15–25°C)
Rainbow stiphodon
Stiphodon ornatus
Freshwater2.6 in (6.5 cm) · 13 gal (50 L)68–79°F (20–26°C)
Raja betta
Betta raja
Freshwater2.8 in (7 cm) · 26 gal (100 L)72–81°F (22–27°C)
Rakhine danio
Devario xyrops
Freshwater3.7 in (9.5 cm) · 29 gal (110 L)68–79°F (20–26°C)
Red belly pipefish
Hippichthys heptagonus
FreshwaterBrackish5.9 in (15 cm) · 21 gal (80 L)75–84°F (24–29°C)
Red bruno pleco
Hypostomus soniae
Freshwater7.9 in (20 cm) · 79 gal (300 L)77–84°F (25–29°C)
Red cheek tropheops
Tropheops sp. 'Red Cheek'
Freshwater5.1 in (13 cm) · 74 gal (280 L)75–81°F (24–27°C)
Red devil cichlid
Amphilophus labiatus
Freshwater13.8 in (35 cm) · 75 gal (284 L)75–79°F (24–26°C)
Red devil tetra
Hyphessobrycon piranga
Freshwater1 in (2.5 cm) · 10 gal (38 L)73–82°F (23–28°C)
Red dwarf rasbora
Microrasbora rubescens
Freshwater1.2 in (3 cm) · 12 gal (45 L)68–77°F (20–25°C)
Red empress cichlid
Protomelas taeniolatus
Freshwater7.9 in (20 cm) · 53 gal (200 L)75–82°F (24–28°C)
Red eye tetra
Moenkhausia sanctaefilomenae
Freshwater2.8 in (7 cm) · 28 gal (105 L)72–79°F (22–26°C)
Red fin cactus pleco
Pseudacanthicus pitanga
Freshwater13.8 in (35 cm) · 119 gal (450 L)77–84°F (25–29°C)
Red fin hap
Copadichromis borleyi
Freshwater7.9 in (20 cm) · 79 gal (300 L)77–84°F (25–29°C)
Red fin otocinclus
Parotocinclus maculicauda
Freshwater2.4 in (6 cm) · 14 gal (54 L)72–81°F (22–27°C)
Red fin thresher pleco
Aphanotorulus emarginatus
Freshwater13.4 in (34 cm) · 119 gal (450 L)77–84°F (25–29°C)
Red flush tetra
Hemigrammus stictus
Freshwater2 in (5 cm) · 20 gal (75 L)73–82°F (23–28°C)
Red head Tapajos
Geophagus pyrocephalus
Freshwater6.3 in (16 cm) · 79 gal (300 L)79–86°F (26–30°C)
Red hillstream loach
Beaufortia leveretti
Freshwater3.1 in (8 cm) · 24 gal (90 L)64–75°F (18–24°C)
Red hump eartheater
Geophagus steindachneri
Freshwater5.9 in (15 cm) · 53 gal (200 L)72–82°F (22–28°C)
Red line halfbeak
Hemirhamphodon phaiosoma
Freshwater2.6 in (6.5 cm) · 14 gal (54 L)73–81°F (23–27°C)
Red lip goby
Sicyopus exallisquamulus
Freshwater2.4 in (6 cm) · 14 gal (54 L)73–81°F (23–27°C)
Red lizard whiptail
Rineloricaria lanceolata
Freshwater3.9 in (10 cm) · 24 gal (90 L)77–82°F (25–28°C)
Red melon dario
Dario hysginon
Freshwater1.2 in (3 cm) · 11 gal (40 L)72–79°F (22–26°C)
Red neon blue-eye
Pseudomugil luminatus
Freshwater1.4 in (3.5 cm) · 11 gal (40 L)72–81°F (22–27°C)
Red phantom tetra
Hyphessobrycon sweglesi
Freshwater1.6 in (4 cm) · 15 gal (55 L)72–82°F (22–28°C)
Red rainbowfish
Glossolepis incisus
Freshwater5.5 in (14 cm) · 34 gal (130 L)72–77°F (22–25°C)
Red shiner
Cyprinella lutrensis
Freshwater3.5 in (9 cm) · 36 gal (135 L)57–77°F (14–25°C)
Red shoulder peacock
Aulonocara hansbaenschi
Freshwater4.1 in (10.5 cm) · 63 gal (240 L)75–81°F (24–27°C)
Red tail barracuda
Acestrorhynchus falcatus
Freshwater11.8 in (30 cm) · 100 gal (380 L)72–82°F (22–28°C)
Red tail lasiancistrus
Lasiancistrus heteracanthus
Freshwater7.1 in (18 cm) · 66 gal (250 L)73–81°F (23–27°C)
Red tail sicyopterus
Sicyopterus lagocephalus
Freshwater5.1 in (13 cm) · 29 gal (110 L)73–81°F (23–27°C)
Red tail squeaker
Synodontis clarias
Freshwater14.2 in (36 cm) · 119 gal (450 L)73–81°F (23–27°C)
Red tiger motaguense
Parachromis motaguensis
Freshwater11.8 in (30 cm) · 100 gal (380 L)75–82°F (24–28°C)
Red wolf fish
Erythrinus erythrinus
Freshwater7.9 in (20 cm) · 40 gal (150 L)72–79°F (22–26°C)
Red zebra cichlid
Maylandia estherae
Freshwater3.9 in (10 cm) · 45 gal (170 L)75–82°F (24–28°C)Red-back moon tetra
Bathyaethiops flammeus
Freshwater2 in (5 cm) · 24 gal (90 L)73–81°F (23–27°C)
Red-bellied pacu
Piaractus brachypomus
Freshwater34.6 in (88 cm) · 1,057 gal (4,000 L)73–82°F (23–28°C)
Red-bellied piranha
Pygocentrus nattereri
Freshwater12.6 in (32 cm) · 160 gal (605 L)75–82°F (24–28°C)
Red-chinned panchax
Epiplatys dageti
Freshwater1.8 in (4.5 cm) · 20 gal (75 L)70–75°F (21–24°C)
Red-lined dwarf cichlid
Apistogramma rubrolineata
Freshwater2 in (5 cm) · 16 gal (60 L)73–81°F (23–27°C)Red-lipped darter tetra
Nannocharax rubrolabiatus
Freshwater2.4 in (6 cm) · 21 gal (80 L)73–82°F (23–28°C)
Red-lipped krib
Wallaceochromis rubrolabiatus
Freshwater3.1 in (8 cm) · 42 gal (160 L)73–81°F (23–27°C)
Red-nosed Madagascar cichlid
Paretroplus kieneri
Freshwater6.3 in (16 cm) · 74 gal (280 L)75–82°F (24–28°C)
Red-seam killifish
Aphyosemion calliurum
Freshwater2.2 in (5.5 cm) · 20 gal (75 L)75–82°F (24–28°C)
Red-spotted tetra
Copeina guttata
Freshwater3.9 in (10 cm) · 32 gal (120 L)73–82°F (23–28°C)
Red-striped killifish
Aphyosemion striatum
Freshwater2 in (5 cm) · 11 gal (40 L)70–77°F (21–25°C)Red-striped puffer
Dichotomyctere erythrotaenia
Freshwater3.3 in (8.5 cm) · 29 gal (110 L)75–82°F (24–28°C)
Red-striped rainbowfish
Melanotaenia rubrostriata
Freshwater5.1 in (13 cm) · 53 gal (200 L)77–86°F (25–30°C)
Red-striped rasbora
Trigonopoma pauciperforatum
Freshwater2.8 in (7 cm) · 22 gal (85 L)72–79°F (22–26°C)Red-tail bitterling
Acheilognathus tonkinensis
Freshwater4.7 in (12 cm) · 40 gal (150 L)61–79°F (16–26°C)
Red-tail brycinus
Brycinus macrolepidotus
Freshwater20.9 in (53 cm) · 264 gal (1,000 L)73–82°F (23–28°C)
Red-tail dwarf cichlid
Apistogramma erythrura
Freshwater2.2 in (5.5 cm) · 16 gal (60 L)73–81°F (23–27°C)
Red-tail dwarf puffer
Carinotetraodon irrubesco
Freshwater1.8 in (4.5 cm) · 17 gal (65 L)72–82°F (22–28°C)
Red-tail pike characin
Boulengerella cuvieri
Freshwater34.6 in (88 cm) · 528 gal (2,000 L)73–82°F (23–28°C)Red-tail silver shark
Hypselobarbus kurali
Freshwater13.8 in (35 cm) · 211 gal (800 L)72–82°F (22–28°C)
Red-tail squirrel loach
Aborichthys elongatus
Freshwater3.5 in (9 cm) · 24 gal (90 L)61–75°F (16–24°C)
Red-tailed black shark
Epalzeorhynchos bicolor
Freshwater4.7 in (12 cm) · 30 gal (115 L)68–79°F (20–26°C)
Red-tailed rasbora
Rasbora borapetensis
Freshwater2.4 in (6 cm) · 18 gal (70 L)72–79°F (22–26°C)
Red-tailed tinfoil barb
Barbonymus altus
Freshwater9.8 in (25 cm) · 106 gal (400 L)72–82°F (22–28°C)
Redback paradisefish
Macropodus erythropterus
Freshwater3.1 in (8 cm) · 20 gal (75 L)68–86°F (20–30°C)
Redback rasbora
Rasbora rubrodorsalis
Freshwater1.6 in (4 cm) · 14 gal (54 L)72–81°F (22–27°C)
Redbreast acara
Laetacara dorsigera
Freshwater2.8 in (7 cm) · 20 gal (75 L)72–81°F (22–27°C)
Redcheek barb
Discherodontus ashmeadi
Freshwater5.4 in (13.6 cm) · 42 gal (160 L)72–81°F (22–27°C)
Redcheek betta
Betta rutilans
Freshwater1.4 in (3.5 cm) · 11 gal (40 L)73–81°F (23–27°C)
Redeye puffer
Carinotetraodon lorteti
Freshwater2.4 in (6 cm) · 14 gal (54 L)75–82°F (24–28°C)
Redfin halfbeak
Nomorhamphus ebrardtii
Freshwater3.5 in (9 cm) · 29 gal (110 L)75–81°F (24–27°C)
Redfin tiger loach
Syncrossus berdmorei
Freshwater9.4 in (24 cm) · 50 gal (190 L)70–79°F (21–26°C)
Redhead cichlid
Vieja melanurus
Freshwater14.6 in (37 cm) · 75 gal (285 L)77–82°F (25–28°C)
Redhook
Myloplus rubripinnis
Freshwater9.8 in (25 cm) · 70 gal (265 L)73–81°F (23–27°C)
Redline torpedo barb
Sahyadria denisonii
Freshwater4.3 in (11 cm) · 53 gal (200 L)59–77°F (15–25°C)
Redlip barb
Pethia erythromycter
Freshwater1.6 in (4 cm) · 14 gal (54 L)72–79°F (22–26°C)
Redspotted panchax
Epiplatys lamottei
Freshwater2.8 in (7 cm) · 14 gal (54 L)68–77°F (20–25°C)
Redstripe hemigrammus
Hemigrammus rubrostriatus
Freshwater2.4 in (6 cm) · 20 gal (75 L)73–82°F (23–28°C)
Redtail bagrid
Hemibagrus nemurus
Freshwater25.6 in (65 cm) · 185 gal (700 L)72–81°F (22–27°C)
Redtail catfish
Phractocephalus hemioliopterus
Freshwater39.4 in (100 cm) · 1,506 gal (5,700 L)68–79°F (20–26°C)
Redtail garra
Garra panitvongi
Freshwater5.1 in (13 cm) · 42 gal (160 L)72–81°F (22–27°C)
Redtail loach
Yasuhikotakia modesta
Freshwater9.8 in (25 cm) · 75 gal (285 L)73–82°F (23–28°C)
Redtail splitfin
Xenotoca eiseni
Freshwater2.8 in (7 cm) · 20 gal (75 L)64–82°F (18–28°C)
Redtail wolf fish
Hoplerythrinus unitaeniatus
Freshwater11 in (28 cm) · 66 gal (250 L)73–82°F (23–28°C)
Regani maskaheros
Maskaheros regani
Freshwater11 in (28 cm) · 119 gal (450 L)75–84°F (24–29°C)
Relict splitfin
Xenoophorus captivus
Freshwater2.4 in (6 cm) · 16 gal (60 L)61–79°F (16–26°C)
Renata betta
Betta renata
Freshwater3.7 in (9.5 cm) · 20 gal (75 L)73–81°F (23–27°C)
Reticulated catfish
Perrunichthys perruno
Freshwater23.6 in (60 cm) · 185 gal (700 L)72–79°F (22–26°C)
Reticulated cory
Brochis reticulata
Freshwater2.4 in (6 cm) · 20 gal (75 L)72–79°F (22–26°C)
Rex halfbeak
Nomorhamphus rex
Freshwater2.2 in (5.5 cm) · 20 gal (75 L)72–79°F (22–26°C)
Reynolds's cory
Hoplisoma reynoldsi
Freshwater1.4 in (3.5 cm) · 12 gal (45 L)72–79°F (22–26°C)
Rhino pleco
Pterygoplichthys scrophus
Freshwater12.6 in (32 cm) · 119 gal (450 L)77–84°F (25–29°C)
Rhytisma cichlid
Cribroheros rhytisma
Freshwater6.3 in (16 cm) · 79 gal (300 L)75–84°F (24–29°C)
Ribbon hillstream loach
Erromyzon kalotaenia
Freshwater2.3 in (5.8 cm) · 20 gal (75 L)64–75°F (18–24°C)
Riffle goby
Stiphodon pelewensis
Freshwater1.8 in (4.5 cm) · 14 gal (54 L)73–81°F (23–27°C)
Ringtail pike cichlid
Crenicichla saxatilis
Freshwater9.4 in (24 cm) · 119 gal (450 L)75–82°F (24–28°C)
Rio Muni benitochromis
Benitochromis riomuniensis
Freshwater3.5 in (9 cm) · 42 gal (160 L)73–81°F (23–27°C)
Rio Negro chocolate cichlid
Hypselecara coryphaenoides
Freshwater7.9 in (20 cm) · 119 gal (450 L)75–82°F (24–28°C)Rio pearlfish
Nematolebias whitei
Freshwater3.1 in (8 cm) · 14 gal (54 L)68–77°F (20–25°C)
Ripsaw catfish
Oxydoras niger
Freshwater39.4 in (100 cm) · 396 gal (1,500 L)72–82°F (22–28°C)
Rita catfish
Rita rita
Freshwater59.1 in (150 cm) · 1,057 gal (4,000 L)72–86°F (22–30°C)
River stone carp
Psilorhynchus sucatio
Freshwater3.1 in (8 cm) · 26 gal (100 L)64–79°F (18–26°C)
Roberts' limbochromis
Limbochromis robertsi
Freshwater3.7 in (9.5 cm) · 29 gal (110 L)73–81°F (23–27°C)
Robertsi squeaker
Synodontis robertsi
Freshwater3.9 in (10 cm) · 42 gal (160 L)73–81°F (23–27°C)
Robertson's cichlid
Cribroheros robertsoni
Freshwater9.1 in (23 cm) · 106 gal (400 L)75–84°F (24–29°C)
Robust cory
Brochis robusta
Freshwater3.1 in (8 cm) · 40 gal (150 L)72–79°F (22–26°C)
Robustulus tetra
Hyphessobrycon robustulus
Freshwater1.7 in (4.4 cm) · 16 gal (60 L)70–81°F (21–27°C)
Rock kribensis
Paralabidochromis sauvagei
Freshwater4.7 in (12 cm) · 66 gal (250 L)73–81°F (23–27°C)
Rohan's barb
Dawkinsia rohani
Freshwater3.9 in (10 cm) · 42 gal (160 L)70–79°F (21–26°C)
Roloff's krib
Pelvicachromis roloffi
Freshwater3.1 in (8 cm) · 29 gal (110 L)73–81°F (23–27°C)
Roman nose angelfish
Pterophyllum leopoldi
Freshwater3.9 in (10 cm) · 30 gal (115 L)72–84°F (22–29°C)
Romand's tropheops
Tropheops romandi
Freshwater3.1 in (8 cm) · 53 gal (200 L)75–82°F (24–28°C)
Ropefish
Erpetoichthys calabaricus
Freshwater14.6 in (37 cm) · 143 gal (540 L)73–86°F (23–30°C)
Rose danio
Danio roseus
Freshwater1.8 in (4.6 cm) · 20 gal (75 L)70–79°F (21–26°C)
Rose flame glassfish
Gymnochanda verae
Freshwater1.2 in (3 cm) · 11 gal (40 L)75–82°F (24–28°C)
Rosita dwarf cichlid
Apistogramma rositae
Freshwater2 in (5 cm) · 16 gal (60 L)75–82°F (24–28°C)
Rostratus sifter cichlid
Cribroheros rostratus
Freshwater8.7 in (22 cm) · 106 gal (400 L)75–84°F (24–29°C)
Rosy barb
Pethia conchonius
Freshwater2.8 in (7 cm) · 24 gal (90 L)61–75°F (16–24°C)1 variety
Rosy bitterling
Rhodeus ocellatus
Freshwater3.1 in (8 cm) · 21 gal (80 L)64–75°F (18–24°C)
Rosy loach
Petruichthys sp. 'rosy'
Freshwater1.2 in (3 cm) · 14 gal (54 L)68–79°F (20–26°C)
Rosy tetra
Hyphessobrycon rosaceus
Freshwater1.6 in (4 cm) · 15 gal (55 L)75–82°F (24–28°C)
Round-tail paradise fish
Macropodus ocellatus
Freshwater3.1 in (8 cm) · 20 gal (75 L)61–75°F (16–24°C)
Roundmouth pike cichlid
Crenicichla cyclostoma
Freshwater4.7 in (12 cm) · 79 gal (300 L)79–86°F (26–30°C)
Royal knifefish
Chitala blanci
Freshwater39.4 in (100 cm) · 317 gal (1,200 L)75–82°F (24–28°C)
Royal pleco
Panaque nigrolineatus
Freshwater16.9 in (43 cm) · 125 gal (473 L)72–82°F (22–28°C)
Royal tetra
Inpaichthys kerri
Freshwater1.4 in (3.5 cm) · 15 gal (55 L)75–81°F (24–27°C)
Royal whiptail catfish
Sturisoma panamense
Freshwater7.9 in (20 cm) · 40 gal (150 L)72–82°F (22–28°C)
Rubber pleco
Parancistrus aurantiacus
Freshwater8.7 in (22 cm) · 79 gal (300 L)77–84°F (25–29°C)
Rubripinnis nothobranch
Nothobranchius rubripinnis
Freshwater1.8 in (4.5 cm) · 11 gal (40 L)72–79°F (22–26°C)
Ruby moenkhausia
Moenkhausia rubra
Freshwater2.1 in (5.4 cm) · 20 gal (75 L)73–82°F (23–28°C)
Ruby sundadanio
Sundadanio rubellus
Freshwater0.9 in (2.3 cm) · 11 gal (40 L)73–81°F (23–27°C)
Ruby tetra
Axelrodia riesei
Freshwater0.8 in (2 cm) · 12 gal (45 L)73–81°F (23–27°C)
Ruby-tinted barb
Dawkinsia rubrotincta
Freshwater3.9 in (10 cm) · 42 gal (160 L)70–79°F (21–26°C)
Rummy-nose tetra
Hemigrammus rhodostomus
Freshwater2 in (5 cm) · 20 gal (75 L)75–81°F (24–27°C)
Rummynose tetra
Petitella bleheri
Freshwater2 in (5 cm) · 20 gal (75 L)75–81°F (24–27°C)
Rust cory
Osteogaster rabauti
Freshwater2.4 in (6 cm) · 20 gal (75 L)72–79°F (22–26°C)
Rusty cichlid
Iodotropheus sprengerae
Freshwater3.9 in (10 cm) · 24 gal (90 L)77–84°F (25–29°C)
Rusty moth catfish
Pseudolaguvia muricata
Freshwater1.2 in (3 cm) · 11 gal (40 L)68–79°F (20–26°C)
Rutten's rasbora
Rasbora rutteni
Freshwater2.2 in (5.5 cm) · 20 gal (75 L)73–81°F (23–27°C)
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