Fishes
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Red-bellied Pacu
Piranhas (Serrasalmidae)
Piaractus brachypomus
The Red-bellied Pacu, scientifically known as Piaractus brachypomus, belongs to the subfamily Serrasalminae. This fish rarely becomes a resident of home aquariums, mainly due to its impressive size and rather modest…
Red-bellied Piranha
Piranhas (Serrasalmidae)
Pygocentrus nattereri
The Red-bellied Piranha, scientifically known as Pygocentrus nattereri, belongs to the family Serrasalmidae. This fish is frequently mentioned, and its notoriety has been significantly cemented by numerous Hollywood…
Red-Black Halfbeak
Halfbeaks (Zenarchopteridae)
Nomorhamphus liemi
The Red-Black Halfbeak, scientifically known as Nomorhamphus liemi (subspecies snijdersi), belongs to the family Zenarchopteridae, or Halfbeaks. This miniature predatory fish requires a careful approach to keeping and…
Red-breasted Acara
Cichlids (Cichlidae)
Laetacara dorsigera
The Laetacara dorsigera, otherwise known as the Red-breasted Acara (scientific name Laetacara dorsigera), belongs to the family Cichlidae. This American cichlid is characterized by its peaceful disposition. It does not…
Red-cheeked Barb
Cyprinids (Cyprinidae)
Systomus orphoides
Systomus orphoides, known as the "Red-cheeked Barb," belongs to the family Cyprinidae, or carps. This species is almost indistinguishable in appearance from its closest relative, the Olive Barb (Systomus sarana). This…
Red-Eyed Pufferfish
Pufferfish (Tetraodontidae)
Carinotetraodon salivator
The Red-Eyed Pufferfish, scientifically known as Carinotetraodon salivator, belongs to the family Tetraodontidae, or pufferfish. In moments of potential threat, this fish, like other members of its family, can inflate…
Red-Eyed Tetra
Acestrorhamphidae
Bario sanctaefilomenae
The Filomena, also known as the Red-Eyed Tetra or Moenkhausia Red-Eye (scientific name Bario sanctaefilomenae), belongs to the family Acestrorhamphidae. This species enjoys well-deserved popularity among aquarists…
Red-finned Distichodus
Distichodontidae
Distichodus affinis
The Red-finned Distichodus, known scientifically as Distichodus affinis, belongs to the family Distichodontidae. These are peaceful, large-sized fish that are not particularly decorative and are perceived more as…
Red-finned Parotocinclus
Armored Catfishes (Loricariidae)
Parotocinclus maculicauda
Parotocinclus maculicauda, known as the Red-finned Parotocinclus, belongs to the family Loricariidae, which includes the Armored Catfishes. This fish is a native of South America, found in the coastal river systems of…
Red-Nosed Rasbora
Cyprinids (Cyprinidae)
Sawbwa resplendens
The Red-Nosed Rasbora, also known as Sawbwa (scientific name Sawbwa resplendens), belongs to the family Cyprinidae. This unique species inhabits only one mountain lake in eastern Burma, Southeast Asia. High demand in…
Red-spotted Cichlid
Cichlids (Cichlidae)
Darienheros calobrensis
The Red-spotted Cichlid, also known by its scientific name Darienheros calobrensis, belongs to the family Cichlidae. It's interesting to note that in the past, this species was classified under a different genus and was…
Red-striped Rainbowfish
Rainbowfishes (Melanotaeniidae)
Melanotaenia splendida rubrostriata
The Red-striped Rainbowfish (scientific name Melanotaenia splendida rubrostriata), also known as the Red-banded Rainbowfish, belongs to the family Melanotaeniidae. This species can be an excellent choice even for…
Red-striped Rasbora
Cyprinids (Cyprinidae)
Trigonopoma pauciperforatum
The Red-striped Rasbora (Trigonopoma pauciperforatum), belonging to the family Cyprinidae, is a beautiful, calm, and peaceful schooling fish, notable for its unpretentiousness. These qualities make it a very popular…
Red-tailed Barb
Cyprinids (Cyprinidae)
Barbonymus altus
The Red-tailed Barb, scientifically known as Barbonymus altus, is a member of the Cyprinidae family. This hardy fish, capable of reaching 20 cm in length, fits perfectly into large aquariums. It is often chosen for…
Red-tailed Bedotia
Madagascar Rainbowfish (Bedotiidae)
Bedotia geayi
The Red-tailed Bedotia (scientific name Bedotia geayi) is a representative of the Bedotiidae family, also known as Madagascar rainbowfish. Despite its vibrant and active nature, this fish requires special attention from…
Red-tailed Chalceus
Chalceidae
Chalceus macrolepidotus
The Red-tailed Chalceus, or Chalceus macrolepidotus by its scientific name, belongs to the family Chalceidae. This rather large predatory species, while not a true aggressor, will not miss an opportunity to snack on…
Red-tailed Gourami
Osphronemidae
Osphronemus laticlavius
The Giant Red-tailed Gourami (scientific name Osphronemus laticlavius) belongs to the family Osphronemidae. This fish is one of the four giant Gourami species, distinguished perhaps by the most vibrant coloration. As an…
Red-tailed Hemibagrus
Bagridae (naked catfishes)
Hemibagrus wyckioides
The Asian Red-tailed Catfish, known scientifically as Hemibagrus wyckioides, is a member of the Bagridae family (Bagrid Catfishes). This is a very large and aggressive predatory fish, rarely suitable for beginner…
Red-tailed Loach
Nemacheilidae
Aborichthys elongatus
Aborichthys elongatus, also known as the Red-tailed Loach, bears the scientific name Aborichthys elongatus and is classified in the family Nemacheilidae. This species is not frequently encountered in pet stores, which…
Red-tailed Rasbora
Cyprinids (Cyprinidae)
Rasbora borapetensis
Rasbora borapetensis, also known as the Red-tailed or Black-striped Rasbora, belongs to the family Cyprinidae. This attractive aquarium fish is valued for its unpretentiousness in care, compatibility with many other…
Redbelly Cichlid
Cichlids (Cichlidae)
Cribroheros longimanus
Cribroheros longimanus, known as the Redbelly Cichlid, belongs to the family Cichlidae. These fish originate from Central America, with their range extending from Guatemala to Costa Rica. They primarily inhabit lakes…
Redcap Oranda
Cyprinids (Cyprinidae)
Carassius auratus
Among the many color variations of the Oranda, the Redcap Oranda Goldfish is undoubtedly the most recognizable. Its distinguishing feature is a snow-white body that brightly contrasts with the growth on its head, known…
Reddish Mystus Catfish
Bagridae (naked catfishes)
Mystus nigriceps
The Reddish Mystus Catfish, scientifically known as Mystus nigriceps, belongs to the Bagridae family, or naked catfishes. This fish has long been popular with aquarists, although until the 1940s it was often mistakenly…
Redtail Barracuda
Acestrorhynchidae
Acestrorhynchus altus
The Redtail Barracuda, scientifically known as Acestrorhynchus altus, belongs to the family Acestrorhynchidae. Its appearance, combining a streamlined, dynamic physique with jaws full of teeth, clearly indicates its…
Redtail Catfish
Pimelodidae (Long-whiskered Catfishes)
Phractocephalus hemioliopterus
The Redtail Catfish, also known as the Flat-headed Catfish, has the scientific name Phractocephalus hemioliopterus and belongs to the family Pimelodidae. This very large representative of the order Siluriformes is…
Reedfish
Polypteridae (Bichirs)
Erpetoichthys calabaricus
The scientific name Erpetoichthys calabaricus belongs to the family Polypteridae, known as the bichirs, and denotes the species known as the Reedfish or Ropefish. These amazing fish are the closest relatives of the…
Regal Danio
Cyprinids (Cyprinidae)
Devario regina
The Regal Danio, scientifically known as Devario regina, is a member of the Cyprinidae family. The presence of the word "regal" in its name does not indicate any unique characteristics of this aquatic inhabitant, as it…
Reticulated Barb
Cyprinids (Cyprinidae)
Desmopuntius foerschi
Desmopuntius foerschi, known as the Reticulated Barb, is a member of the Cyprinidae family. This active and peaceful fish will be an excellent addition to a mixed community of freshwater inhabitants. Its ease of care…
Reticulated Corydoras
Armored Catfish (Callichthyidae)
Corydoras reticulatus
The Reticulated Corydoras, scientifically known as Corydoras reticulatus, is a member of the family Callichthyidae, or Armored Catfishes. Its natural habitat is South America, where it is widely distributed in the lower…
Reticulated Rasbora
Cyprinids (Cyprinidae)
Rasbora reticulata
Rasbora reticulata, known as the Reticulated Rasbora, is a member of the carp family (Cyprinidae). This fish originates from Southeast Asia. It is found on Sumatra and on Nias Island, which lies to the west of it. It…
Reticulated Woodcat
Driftwood Catfishes (Auchenipteridae)
Centromochlus reticulatus
Centromochlus reticulatus, more commonly known as the Reticulated Woodcat or Purple Oil Catfish, belongs to the family Auchenipteridae (Driftwood Catfishes). This species is notable for its ease of care and breeding, as…
Retroculus xinguensis
Cichlids (Cichlidae)
Retroculus xinguensis
Retroculus xinguensis, a member of the Cichlidae family, has not gained widespread popularity among American cichlid enthusiasts. This is likely due to its rather modest coloration and specific habitat requirements,…
Reval Barb
Cyprinids (Cyprinidae)
Pethia reval
Pethia reval, known as the Reval Barb, belongs to the family Cyprinidae. For a long time, the species was considered only a color variant of the Cuming's Barb, and only in 2008 did it receive independent status.…
Rhoadsia
Acestrorhamphidae
Rhoadsia altipinna
Rhoadsia altipinna, or the high-finned Rhoadsia, belongs to the family Acestrorhamphidae and originates from the waters of South America. These fish inhabit river systems that primarily flow through Ecuador and empty…
Rhombus Barb
Cyprinids (Cyprinidae)
Desmopuntius rhomboocellatus
The Rhombus Barb, scientifically known as Desmopuntius rhomboocellatus, belongs to the family Cyprinidae. This small fish, with its distinctive body coloration and specific water chemistry requirements, thrives in…
Ricefish
Adrianichthyidae
Oryzias asinua
Oryzias asinua, known as the Asian Ricefish, belongs to the family Adrianichthyidae and is part of the Killifish group, also called Toothcarps. This fish is a close relative of the Japanese Ricefish, inheriting its…
River Stingray
Potamotrygonidae (River stingrays)
Potamotrygon motoro
The Ocellated River Stingray, also known as the South American Freshwater Stingray (scientific name Potamotrygon motoro), belongs to the family Potamotrygonidae. This predator poses a certain danger to aquarists due to…
Rivulus agilae
Rivulidae
Laimosemion agilae
Laimosemion agilae, also known as Rivulus agilae, belongs to the family Rivulidae. These fish originate from South America, where they can be found in French Guiana, Suriname, and Guyana. They are named after the…
Rivulus caudomarginatus
Rivulidae
Kryptolebias caudomarginatus
Rivulus caudomarginatus, known scientifically as Kryptolebias caudomarginatus, belongs to the family Rivulidae. This fish species originates from South America, where its wild populations are found along the coastline…
Rivulus igneus
Rivulidae
Anablepsoides igneus
The fish Rivulus igneus, scientifically known as Anablepsoides igneus, is a member of the Rivulidae family. Its natural habitat is South America, specifically the Oyapock River basin, located in the northeastern part of…
Rivulus luelingi
Rivulidae
Atlantirivulus luelingi
The fish, known by the scientific name Atlantirivulus luelingi (formerly Rivulus luelingi) and belonging to the family Rivulidae, is Rivulus luelingi. This species originates from shallow waters in the southern regions…
Rohan's Barb
Cyprinids (Cyprinidae)
Dawkinsia rohani
The fish known as Rohan's Barb (Dawkinsia rohani by its scientific name) belongs to the family Cyprinidae. Its name is a tribute to two prominent biologist-ichthyologists, Richard Dawkins and Rohan Pethiyagoda. This…
Roloffia huwaldi
Nothobranchiidae
Callopanchax huwaldi
The fish Roloffia huwaldi, known scientifically as Callopanchax huwaldi (formerly Roloffia huwaldi), belongs to the family Nothobranchiidae, or nothobranchs. Its homeland is West Africa, where it is found in Sierra…
Rosen's Brachyrhaphis
Poeciliidae
Brachyrhaphis roseni
Brachyrhaphis roseni, also known as Rosen's Brachyrhaphis, belongs to the family Poeciliidae. It is an active and colorful fish with a rather complex character. Its keeping does not present particular difficulties, but…
Rosy Barb
Cyprinids (Cyprinidae)
Pethia conchonius
The Rosy Barb, scientifically known as Pethia conchonius, is a member of the Cyprinidae family. Its vibrant appearance is sure to catch the eye, and its high activity makes observing these fish a captivating experience,…
Rosy Danio
Cyprinids (Cyprinidae)
Danio roseus
The Rosy Danio, scientifically known as Danio roseus, belongs to the family Cyprinidae (Carps). This fish is a relatively recent addition to the aquarium hobby but has quickly gained popularity. Its care and breeding…
Rosy Tetra
Acestrorhamphidae
Megalamphodus rosaceus
The Rosy Tetra, also known as the Rosaceus Tetra (Megalamphodus rosaceus), belongs to the family Acestrorhamphidae and makes an excellent addition to a community of peaceful aquarium inhabitants. This fish shows…
Roundtail Paradise Fish
Osphronemidae
Macropodus ocellatus
The Roundtail Paradise Fish, also known as the Chinese Paradise Fish, with the scientific name Macropodus ocellatus, is a member of the Osphronemidae family. This beautiful fish stands out for its exceptional hardiness,…
Royal Panaque
Armored Catfishes (Loricariidae)
Panaque nigrolineatus
The Royal Panaque, known in scientific literature as Panaque nigrolineatus, belongs to the family Loricariidae, which includes armored catfish. This large fish is distinguished by its beautiful appearance and…
Royal Tiger Pleco
Armored Catfishes (Loricariidae)
Hypancistrus sp. L066
The Royal Tiger Pleco, scientifically known as Hypancistrus sp. L066, belongs to the family Loricariidae, or Armored Catfishes. Its natural habitat is South America, where it is primarily found in the Brazilian state of…
Rubrostigma
Acestrorhamphidae
Megalamphodus erythrostigma
The Red-Spotted Tetra, also known as Rubrostigma or Ornate Red-Spotted Tetra (scientific name Megalamphodus erythrostigma), belongs to the Acestrorhamphidae family. This active, peaceful fish, distinguished by its…
Ruby Nannostomus
Lebiasinidae
Nannostomus rubrocaudatus
Nannostomus rubrocaudatus, known as the Ruby Nannostomus, belongs to the family Lebiasinidae. This picturesque fish has gained widespread popularity among hobby aquarists due to its vibrant coloration and relatively…
Ruby Tetra
Acestrorhamphidae
Axelrodia riesei
Axelrodia riesei, also known as the Ruby Tetra or Axelrod's Tetra, is a fish from the Characin family. Its Latin name has an interesting origin, being a combination of the names of two scientists — Herbert R. Axelrod…
Rummy-nose Tetra
Acestrorhamphidae
Petitella rhodostoma
The Rummy-nose Tetra, also known by its scientific name Petitella rhodostoma, belongs to the family Acestrorhamphidae. This fish deservedly enjoys popularity because it is quite undemanding, easily coexists with many…
Ryukin
Cyprinids (Cyprinidae)
Carassius auratus
The Ryukin, known in English-speaking countries as the Ryukin Goldfish, is a Japanese adaptation of the Nymph goldfish. Although both varieties originated from a common ancestor, the Ryukin is distinguished by a high…
Saddle Corydoras
Armored Catfish (Callichthyidae)
Corydoras ephippifer
Corydoras ephippifer, also known as the Saddle Corydoras, bears the scientific name Corydoras ephippifer. It is a member of the Callichthyidae family, which includes armored or callichthyid catfishes. Its name is…
Saddled Hillstream Loach
River Loaches (Balitoridae)
Homaloptera orthogoniata
Homaloptera orthogoniata, more commonly known as the Saddled Hillstream Loach, is a member of the Balitoridae family (River Loaches). This species is still quite rare among aquarists, and often other closely related…
Sailfin Catfish
Pimelodidae (Long-whiskered Catfishes)
Leiarius pictus
The Sailfin Catfish, also known by its scientific name Leiarius pictus or Marbled Catfish, belongs to the family Pimelodidae. This catfish is distinguished by its beauty and unpretentiousness, but its impressive size…
Sailfin Molly
Poeciliidae
Poecilia latipinna
The Sailfin Molly, also known as Poecilia latipinna, belongs to the Poeciliidae family. This beautiful fish attracts attention with its unusually large and wide dorsal fin, which outwardly resembles a sail. Nowadays, it…