Fishes
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Neon Lampeye
Poeciliidae
Poropanchax luxophthalmus
The Neon Lampeye, scientifically known as Poropanchax luxophthalmus (formerly classified as Aplocheilichthys luxophthalmus), is a member of the Poeciliidae family. This beautiful schooling fish is easy to keep and…
Neon Rainbowfish
Rainbowfishes (Melanotaeniidae)
Melanotaenia praecox
Melanotaenia praecox, also known as the Neon Rainbowfish or Dwarf Rainbowfish, is a member of the family Melanotaeniidae. A relatively small schooling fish, it attracts attention with its beautiful neon shimmer in its…
Neon Tetra
Acestrorhamphidae
Paracheirodon innesi
Paracheirodon innesi, better known as the Neon Tetra or Blue Neon, belongs to the Acestrorhamphidae family. This aquarium fish rightly holds a place among the most beloved and popular species. As early as the 1930s, it…
Net stingray
Potamotrygonidae (River stingrays)
Potamotrygon orbignyi
The reticulated stingray, scientific name, Potamotrygon orbignyi, belongs to the family Potamotrygonidae (river stingrays). Its earlier scientific name, Potamotrygon reticulatus, is now treated as a synonym.
New Guinea Blue-eye
Pseudomugilidae
Pseudomugil novaeguineae
A member of the family Pseudomugilidae, scientifically named Pseudomugil novaeguineae, is known as the New Guinea Blue-eye. This rainbowfish is notable for its vibrant coloration. Although it is considered a peaceful…
New Guinea Rainbowfish
Rainbowfishes (Melanotaeniidae)
Melanotaenia affinis
The Northern Melanotaenia, widely known as the New Guinea Rainbowfish, belongs to the family Melanotaeniidae and has the scientific name Melanotaenia affinis. These beautiful fish are peaceful and undemanding, allowing…
Nigerian Lampeye
Poeciliidae
Procatopus similis
The Nigerian or Iridescent Lampeye, scientifically known as Procatopus similis, is a member of the Poeciliidae family. Despite its modest size, this fish attracts attention with its amazing, iridescent body coloration,…
Nomorhamphus liemi
Halfbeaks (Zenarchopteridae)
Nomorhamphus liemi
Nomorhamphus liemi, scientifically known as Nomorhamphus liemi (subspecies liemi), belongs to the family Zenarchopteridae. It is noted that the common Russian name is often applied to the entire species, not just this…
Norbert's Apistogramma
Cichlids (Cichlidae)
Apistogramma norberti
Norbert's Apistogramma (Apistogramma norberti), a representative of the Cichlidae family, is an attractive and rather undemanding aquarium fish. It coexists well with many freshwater species from South America. By…
Norman's Lampeye Killifish
Poeciliidae
Poropanchax normani
Norman's Lampeye, also known as Poropanchax normani, belongs to the family Poeciliidae (livebearers). These peaceful schooling fish are easy to keep and breed, making them a wonderful addition to any freshwater…
Northern Aulonocara
Cichlids (Cichlidae)
Aulonocara ethelwynnae
Aulonocara ethelwynnae, or Northern Aulonocara, is a representative of the Cichlidae family. These individuals, characteristic of cichlids from the great African lakes, are quite easy to keep and breed provided they…
Nothobranchius eggersi
Nothobranchiidae
Nothobranchius eggersi
Nothobranchius eggersi, scientifically known as Nothobranchius eggersi, belongs to the family Nothobranchiidae. A distinctive feature is its life cycle, which in natural conditions is only one year. During this short…
Nothobranchius foerschi
Nothobranchiidae
Nothobranchius foerschi
Nothobranchius foerschi, or Foersch's Nothobranch, belongs to the family Nothobranchiidae. This small African fish attracts attention with its beauty, but one of its characteristics is an extremely limited lifespan. In…
Nothobranchius furzeri
Nothobranchiidae
Nothobranchius furzeri
Nothobranchius furzeri, scientifically known as Nothobranchius furzeri, belongs to the family Nothobranchiidae, known as Nothobranchs. This species was named after Richard E. Furzer, who first discovered it. In their…
Nothobranchius guentheri
Nothobranchiidae
Nothobranchius guentheri
The fish, known by its scientific name Nothobranchius guentheri, belongs to the family Nothobranchiidae, or African killifishes. It was named after Albert Günther, a British ichthyologist of German origin (1830–1914);…
Nothobranchius kirki
Nothobranchiidae
Nothobranchius kirki
Nothobranchius kirki, scientifically known as Nothobranchius kirki, belongs to the family Nothobranchiidae, or African Rivulines. This is an attractive fish with a distinct personality, especially the males. While…
Nothobranchius korthausae
Nothobranchiidae
Nothobranchius korthausae
Nothobranchius korthausae, or Korthaus' Nothobranch, is a species belonging to the family Nothobranchiidae, and although its coloration is not particularly original, the overall appearance of the fish is quite…
Nothobranchius melanospilus
Nothobranchiidae
Nothobranchius melanospilus
The fish, known scientifically as Nothobranchius melanospilus, or the Black-spotted Nothobranchius, belongs to the family Nothobranchiidae, which unites all Nothobranchius species.
Nothobranchius palmqvisti
Nothobranchiidae
Nothobranchius palmqvisti
The fish Nothobranchius palmqvisti, known scientifically as Nothobranchius palmqvisti, is a member of the family Nothobranchiidae, which includes African rivulines, or Nothobranchius. It is named in honor of G.…
Nothobranchius patrizii
Nothobranchiidae
Nothobranchius patrizii
Nothobranchius patrizii is a representative of the family Nothobranchiidae, also known as African Rivulines. These fish are characterized by their bright, lively nature, especially the males. Although their keeping is…
Nothobranchius rachovii
Nothobranchiidae
Nothobranchius rachovii
Nothobranchius rachovii, more commonly known as Rachow's Nothobranch, is a member of the family Nothobranchiidae. This fish attracts with its bright and beautiful appearance, displaying one of the most colorful guises…
Nothobranchius ugandensis
Nothobranchiidae
Nothobranchius ugandensis
Nothobranchius ugandensis, more commonly known as the Uganda killifish, belongs to the family Nothobranchiidae, or African rivulines. These are energetic fish with a vibrant disposition, quite easy to care for, and…
OB Mbuna
Cichlids (Cichlidae)
Pseudotropheus crabro
The OB Mbuna form (OB Mbuna) represents an example of natural polymorphism, characteristic of some species of Malawian cichlids. These fish inhabit the African Lake Nyasa and are distinguished by their peculiar…
Ocellated Gourami
Osphronemidae
Parasphaerichthys ocellatus
The Ocellated Gourami, also known as Parasphaerichthys ocellatus, belongs to the family Osphronemidae. Among aquarists, it is sometimes called the Dwarf or Burmese Chocolate Gourami. This species is considered…
Odessa Barb
Cyprinids (Cyprinidae)
Pethia padamya
Scientifically named Pethia padamya, this species belongs to the Cyprinidae family and is known as the Odessa Barb. Despite its name, this fish does not inhabit Ukraine. It entered the aquarium hobby in the 1970s, but…
Ogre Catfish
Driftwood Catfishes (Auchenipteridae)
Asterophysus batrachus
The Ogre Catfish, also known as the Frogmouth Catfish or Halper (scientific name Asterophysus batrachus), belongs to the family Auchenipteridae, or Driftwood Catfishes. This large carnivorous species is not recommended…
Oliotius oligolepis
Cyprinids (Cyprinidae)
Oliotius oligolepis
Oliotius oligolepis, also known as the Checkerboard Barb (scientific name Oliotius oligolepis), belongs to the Cyprinidae family. This aquarium fish is popular due to its unpretentiousness and ease of care. It coexists…
Ompok Catfish
Sheatfishes (Siluridae)
Ompok bimaculatus
Ompok bimaculatus, or the Two-spot Ompok (also known as the Ompok Catfish), belongs to the family Siluridae — the Sheatfishes. This fish is found in its natural habitat in the waters of South and Southeast Asia,…
One-lined Pencilfish
Lebiasinidae
Nannostomus unifasciatus
Nannostomus unifasciatus, also known as the One-lined Pencilfish, belongs to the family Lebiasinidae. This popular aquarium fish is notable for its unusual oblique swimming style, which distinguishes it from other…
One-spot Barb
Cyprinids (Cyprinidae)
Puntius terio
Puntius terio, known as the One-spot Barb, belongs to the Cyprinidae family. Despite its naturally wide habitat range and relative unpretentiousness in keeping, this fish is not often found in home aquariums. Its modest…
Opsarius dogarsinghi
Cyprinids (Cyprinidae)
Opsarius dogarsinghi
The fish, known by the scientific name Opsarius dogarsinghi, or Dogarsingh's Baril, belongs to the Carp family (Cyprinidae). It received its name in honour of Sardar Dogar Singh, State Overseer of Manipur, India, who…
Oranda
Cyprinids (Cyprinidae)
Carassius auratus
The Oranda, also known as the Oranda Goldfish in English-speaking countries, is a very attractive and distinctive fish. Its distinguishing feature is a large head growth, resembling a cap. This growth, which usually…
Orange Chromide
Cichlids (Cichlidae)
Pseudetroplus maculatus
The Spotted Chromide, also known as the Orange Chromide (scientific name Pseudetroplus maculatus), belongs to the family Cichlidae. It is a beautiful and very bright fish, particularly notable for its ornamental forms.…
Orange Danio
Cyprinids (Cyprinidae)
Danio kyathit
The Orange Danio, also known as the Orange-finned Danio (scientific name Danio kyathit), belongs to the Cyprinidae family. This active and beautiful fish can adorn any freshwater aquarium. Its appeal is enhanced by its…
Oreichthys Barb
Cyprinids (Cyprinidae)
Oreichthys crenuchoides
The Oreichthys barb, known scientifically as Oreichthys crenuchoides, belongs to the carp family (Cyprinidae). Among barbs, this fish stands out due to noticeable differences between males and females. Males are…
Oreichthys cosuatis
Cyprinids (Cyprinidae)
Oreichthys cosuatis
Oreichthys cosuatis, scientifically known as Oreichthys cosuatis, is a member of the carp family (Cyprinidae). This miniature schooling fish can be a wonderful addition to a community aquarium, especially if kept with…
Orinoco Pleco
Armored Catfishes (Loricariidae)
Hypancistrus contradens
The Orinoco Pleco, scientifically known as Hypancistrus contradens, is a member of the armored catfish family (Loricariidae). It is often called the "Polka Dot Pleco" due to the distinctive pattern on its body.
Orinoco Pterolebias
Rivulidae
Pterolebias hoignei
Pterolebias hoignei, known as the Orinoco Pterolebias, is a member of the family Rivulidae, which includes many species of rivuline killifish. This vibrant annual fish lives in the wild in temporary water bodies that…
Ornate Crenuchus
Crenuchidae
Crenuchus spilurus
The Ornate Crenuchus, scientifically known as Crenuchus spilurus, is a native member of the family Crenuchidae. This unique and attractive fish stands out among most characins due to its pronounced sexual dimorphism and…
Ornate Ctenopoma
Anabantidae
Microctenopoma ansorgii
The peaceful and calm aquarium fish, known as Ansorg's Ctenopoma or Ornate Ctenopoma (scientific name Microctenopoma ansorgii), belongs to the family Anabantidae. Its body is adorned with a bright and contrasting…
Ornate Glass Bagrid
Bagridae (naked catfishes)
Hyalobagrus ornatus
The scientific name Hyalobagrus ornatus refers to the Ornate Glass Bagrid, a representative of the family Bagridae. This catfish originates from Southeast Asia. It can be found in the river systems of the southern part…
Ornate Licorice Gourami
Osphronemidae
Parosphromenus ornaticauda
The Ornate Licorice Gourami, also known as Parosphromenus ornaticauda, belongs to the family Osphronemidae. These fish are available for purchase, but their keeping is associated with a number of difficulties, so they…
Ornate Pimelodus
Pimelodidae (Long-whiskered Catfishes)
Pimelodus ornatus
The Ornate Pimelodus, also known as the Ornate Catfish (scientific name Pimelodus ornatus), belongs to the family Pimelodidae. This species is one of the most picturesque representatives of catfish, distinguished by its…
Ornate Snakehead
Snakeheads (Channidae)
Channa pleurophthalma
The Ornate Snakehead (Channa pleurophthalma) is a species belonging to the family Channidae, or Snakeheads. Its scientific name is Channa pleurophthalma. A distinctive feature of its appearance is the expressive black…
Ornate Tetra
Acestrorhamphidae
Megalamphodus bentosi
The Ornate Tetra, also known as the Common Ornate Tetra or by its scientific name Megalamphodus bentosi, belongs to the family Acestrorhamphidae. This species is a classic representative of the extensive group of…
Oryzias eversi
Adrianichthyidae
Oryzias eversi
Belonging to the family Adrianichthyidae, Oryzias eversi is a modest-sized but very active fish. Its ease of keeping and breeding, as well as its ability to coexist peacefully with many other species, make it an…
Oryzias woworae
Adrianichthyidae
Oryzias woworae
Oryzias woworae, known as the Sulawesi ricefish, is classified in the family Adrianichthyidae. This fish received its interesting name in honour of Daisy Wowor of the Museum Zoologicum Bogoriense on Java, Indonesia, who…
Oscar Cichlid
Cichlids (Cichlidae)
Astronotus ocellatus
The Oscar cichlid, scientifically known as Astronotus ocellatus, belongs to the family Cichlidae. This popular aquarium fish comes in various color forms, as well as unique morphological variants with extended fins.…
Osteochilus
Cyprinids (Cyprinidae)
Osteochilus microcephalus
The fish, known in the scientific world as Osteochilus microcephalus, belongs to the family Cyprinidae. Its homeland is Southeast Asia, with its natural habitat covering significant territories, stretching from Thailand…
Oto Catfish
Armored Catfishes (Loricariidae)
Otocinclus macrospilus
Otocinclus macrospilus, known as the Otocinclus macrospilus or Oto Catfish, belongs to the family Loricariidae, which includes armored catfish. Among its close relatives are Otocinclus affinis and the Zebra Otocinclus.…
Otocinclus affinis
Armored Catfishes (Loricariidae)
Otocinclus affinis
Otocinclus affinis, known scientifically as Otocinclus affinis, belongs to the Loricariidae family, which includes armored catfish. This fish is peaceful and calm, but its inconspicuous coloration prevents it from…
Otocinclus flexilis
Armored Catfishes (Loricariidae)
Otocinclus flexilis
Otocinclus flexilis, known as the Spotted Otocinclus, belongs to the family Loricariidae, which includes armored catfish. In its natural habitat, this catfish lives in the drainage basin of the shallow Patos Lagoon,…
Otocinclus negros
Armored Catfishes (Loricariidae)
Otothyropsis piribebuy
Otothyropsis piribebuy, known as Otocinclus negros (formerly Otocinclus sp. "Negros"), belongs to the family Loricariidae, which includes armored catfishes. The native habitat of this small catfish is the waters of…
Pachypanchax arnoulti
Aplocheilidae
Pachypanchax arnoulti
Pachypanchax arnoulti, or Arnoult's Panchax, is a member of the Aplocheilidae family. This fish readily adapts to aquarium conditions and does not require complex care, but tankmates small enough to swallow are likely…
Pachypanchax omalonotus
Aplocheilidae
Pachypanchax omalonotus
Pachypanchax omalonotus, or Omalonotus Panchax, belongs to the family Aplocheilidae. This species is well-known in aquaristics and is distinguished by a variety of colorations depending on geographic origin. Numerous…
Paddle-nosed Catfish
Pimelodidae (Long-whiskered Catfishes)
Sorubim lima
Sorubim lima, known as the Paddle-nosed Catfish, is a member of the family Pimelodidae (Long-whiskered Catfishes). This catfish originates from South America, where it is considered one of the continent's most common…
Painted Pleco
Armored Catfishes (Loricariidae)
Hypancistrus sp. L260
The Queen Arabesque Pleco, or Painted Pleco, scientifically known as Hypancistrus sp. L260, belongs to the Loricariidae family, which includes armored catfish. The lack of a universally recognized scientific…
Pakistani Loach
Botiidae
Botia almorhae
The Almora Loach, scientifically known as Botia almorhae, belongs to the family Botiidae, commonly referred to as the Pakistani Loach. It's important to note that these names often encompass not only closely related…
Pale Betta
Osphronemidae
Betta pallifina
Betta pallifina, known as the Pale Betta, belongs to the family Osphronemidae. This fish gets its name from its subdued coloration, which differs from the more vibrant hues of its related species. It exhibits a rather…
Panchax
Aplocheilidae
Aplocheilus panchax
The scientific name Aplocheilus panchax indicates that this fish belongs to the family Aplocheilidae. Known as Panchax, this killifish is one of the most popular and recognizable among aquarists, largely due to the wide…