South America
Adolf's catfish
Corydoras adolfoi
Temp22–26°C
pH6–7
Size5.7 cm
DietOmnivore
SwimBottom
DifficultyModerate
Adolf's catfish
Corydoras adolfoi
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South America
Agassiz's dwarf cichlid
Apistogramma agassizii
Temp22–29°C
pH5–7
Size4.4 cm
DietCarnivore
SwimBottom
DifficultyModerate
Agassiz's dwarf cichlid
Apistogramma agassizii
Asia
Almorha loach
Botia almorhae
Temp19–27.5°C
pH6–7.5
Size16 cm
DietOmnivore
SwimBottom
DifficultyModerate
Almorha loach
Botia almorhae
Japan, Taiwan, Korea
Amano Shrimp
Caridina multidentata
Temp18–28°C
pH6.5–7.5
Size5 cm
DietHerbivore
SwimAll levels
DifficultyEasy
Amano Shrimp
Caridina multidentata
South America
Arawana
Osteoglossum bicirrhosum
Temp20–30°C
pH5–7.5
Size80 cm
DietCarnivore
SwimTop
DifficultyExpert
Arawana
Osteoglossum bicirrhosum
Southeast Asia
Asian bumblebee catfish
Pseudomystus siamensis
Temp22–26°C
pH6–7.5
Size18 cm
DietCarnivore
SwimBottom
DifficultyModerate
Asian bumblebee catfish
Pseudomystus siamensis
Asia
Asian Stone Catfish
Hara jerdoni
Temp18–24°C
pH6–7.5
Size4 cm
DietOmnivore
SwimBottom
DifficultyModerate
Asian Stone Catfish
Hara jerdoni
Asia
Assamese snakehead
Channa stewartii
Temp18–25°C
pH6.5–7.5
Size29.7 cm
DietCarnivore
SwimMiddle
DifficultyModerate
Assamese snakehead
Channa stewartii
Southeast Asia (Indonesia, Thailand, Malaysia)
Assassin Snail
Anentome helena
Temp20–28°C
pH7.2–8.5
Size3 cm
DietCarnivore
SwimBottom
DifficultyEasy
Assassin Snail
Anentome helena
Asia
Badis
Badis badis
Temp20–26°C
pH6–8
Size7.1 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Badis
Badis badis
Southeast Asia (Indonesia, Malaysia, Thailand)
Bamboo Shrimp
Atyopsis moluccensis
Temp22–28°C
pH6.5–7.5
Size10 cm
DietDetritivore
SwimBottom
DifficultyModerate
Bamboo Shrimp
Atyopsis moluccensis
West Africa
Banded panchax
Epiplatys annulatus
Temp23–26°C
pH5.5–7
Size3.5 cm
DietInsectivore
SwimTop
DifficultyModerate
Banded panchax
Epiplatys annulatus
Asia
Beaufortia
Beaufortia pingi
Temp18–24°C
pH6.5–7.5
Size7.4 cm
DietHerbivore
SwimBottom
DifficultyModerate
Beaufortia
Beaufortia pingi
Central America
Biajaca
Nandopsis tetracanthus
Temp24–30°C
pH7–8
Size20 cm
DietCarnivore
SwimMiddle
DifficultyModerate
Biajaca
Nandopsis tetracanthus
Rio Tocantins basin, Brazil
Bigtooth river stingray
Potamotrygon henlei
Temp23–28°C
pH6–7.5
Size60 cm
DietCarnivore
SwimBottom
DifficultyExpert
Bigtooth river stingray
Potamotrygon henlei
South America (Brazil, Colombia, Guyana)
Black Arowana
Osteoglossum ferreirae
Temp24–30°C
pH5–6.5
Size80 cm
DietCarnivore
SwimMiddle
DifficultyExpert
Black Arowana
Osteoglossum ferreirae
South America
Black ghost
Apteronotus albifrons
Temp23–28°C
pH6–8
Size50 cm
DietCarnivore
SwimBottom
DifficultyModerate
Black ghost
Apteronotus albifrons
South America
Black neon tetra
Hyphessobrycon herbertaxelrodi
Temp20–28°C
pH5–7.5
Size3.2 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Black neon tetra
Hyphessobrycon herbertaxelrodi
Upper Rio Madeira basin (Bolivia/Brazil), Pantanal
Black phantom tetra
Hyphessobrycon megalopterus
Temp20–28°C
pH5–7
Size3.6 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Black phantom tetra
Hyphessobrycon megalopterus
Asia
Black ruby barb
Pethia nigrofasciata
Temp20–27°C
pH5.5–7.5
Size5.5 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Black ruby barb
Pethia nigrofasciata
South America
Black tetra
Gymnocorymbus ternetzi
Temp20–26°C
pH6–8
Size7.5 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Black tetra
Gymnocorymbus ternetzi
South America
Blackline penguinfish
Thayeria boehlkei
Temp22–28°C
pH5.5–8
Size6 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Blackline penguinfish
Thayeria boehlkei
Asia
Blackline rasbora
Rasbora borapetensis
Temp22–26°C
pH6–7.5
Size5 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Blackline rasbora
Rasbora borapetensis
Upper Amazon basin (Brazil/Peru/Colombia)
Bleeding-heart tetra
Hyphessobrycon erythrostigma
Temp21–28°C
pH4–7.5
Size6 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Bleeding-heart tetra
Hyphessobrycon erythrostigma
South America
Blue acara
Andinoacara pulcher var.
Temp22–28°C
pH6.5–8
Size16 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Blue acara
Andinoacara pulcher var.
Asia
Blue Belly Goby
Stiphodon percnopterygionus
Temp22–26°C
pH6.5–7.5
Size5 cm
DietHerbivore
SwimBottom
DifficultyModerate
Blue Belly Goby
Stiphodon percnopterygionus
Asia
Blue danio
Brachydanio kerri
Temp18–26°C
pH6.5–7.5
Size4.5 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Blue danio
Brachydanio kerri
Africa
Blue gularis
Fundulopanchax sjostedti
Temp22–26°C
pH6–8
Size13 cm
DietCarnivore
SwimMiddle
DifficultyModerate
Blue gularis
Fundulopanchax sjostedti
Africa
Blue lyretail
Fundulopanchax gardneri
Temp20–26°C
pH6–7.5
Size5.5 cm
DietCarnivore
SwimAll levels
DifficultyModerate
Blue lyretail
Fundulopanchax gardneri
Africa
Blue streak hap
Labidochromis caeruleus
Temp24–28°C
pH7.7–8.6
Size10 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Blue streak hap
Labidochromis caeruleus
Taiwan (selectively bred)
Blue Velvet Shrimp
Neocaridina davidi var. blue
Temp18–28°C
pH6.5–8
Size3 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Blue Velvet Shrimp
Neocaridina davidi var. blue
South America
Blue-eye panaque
Panaque suttonorum
Temp20–24°C
pH6.2–7.5
Size28 cm
DietHerbivore
SwimBottom
DifficultyHard
Blue-eye panaque
Panaque suttonorum
Asia
Bluefinned snakehead
Channa bleheri
Temp18–25°C
pH6–7.5
Size14.4 cm
DietCarnivore
SwimMiddle
DifficultyModerate
Bluefinned snakehead
Channa bleheri
Africa
Bluegray mbuna
Melanochromis johannii
Temp24–28°C
pH7.5–8.6
Size10 cm
DietHerbivore
SwimBottom
DifficultyModerate
Bluegray mbuna
Melanochromis johannii
Asia
Boeseman's rainbowfish
Melanotaenia boesemani
Temp27–30°C
pH7–8
Size11 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Boeseman's rainbowfish
Melanotaenia boesemani
South America
Bolivian Ram
Mikrogeophagus altispinosus
Temp24–28°C
pH6–7.5
Size8 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Bolivian Ram
Mikrogeophagus altispinosus
Borneo (Southeast Asia)
Borneo Loach
Pangio shelfordii
Temp24–29°C
pH6–7
Size8 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Borneo Loach
Pangio shelfordii
South America
Bronze corydoras
Corydoras aeneus
Temp22–26°C
pH6–8
Size7.5 cm
DietOmnivore
SwimBottom
DifficultyEasy
Bronze corydoras
Corydoras aeneus
South America
Buenos Aires tetra
Hyphessobrycon anisitsi
Temp16–28°C
pH5.5–8.5
Size6 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Buenos Aires tetra
Hyphessobrycon anisitsi
North America
Butterfly splitfin
Ameca splendens
Temp20–26°C
pH7–8
Size8 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Butterfly splitfin
Ameca splendens
Sulawesi, Indonesia
Cardinal Shrimp
Caridina dennerli
Temp26–30°C
pH7.5–8.5
Size2.5 cm
DietOmnivore
SwimBottom
DifficultyExpert
Cardinal Shrimp
Caridina dennerli
South America
Cardinal tetra
Paracheirodon axelrodi
Temp23.9–28.9°C
pH4–6
Size3 cm
DietPlanktivore
SwimMiddle
DifficultyEasy
Cardinal tetra
Paracheirodon axelrodi
Asia
Celebes rainbowfish
Marosatherina ladigesi
Temp22.2–27.8°C
pH7–8
Size8 cm
DietOmnivore
SwimAll levels
DifficultyModerate
Celebes rainbowfish
Marosatherina ladigesi
Asia
Checkered barb
Oliotius oligolepis
Temp18–25°C
pH5.5–7.5
Size4.5 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Checkered barb
Oliotius oligolepis
Asia
Chen Hillstream Loach
Pseudogastromyzon cheni
Temp20–25°C
pH6.5–7.5
Size5 cm
DietOmnivore
SwimBottom
DifficultyHard
Chen Hillstream Loach
Pseudogastromyzon cheni
Asia
Cherry barb
Puntius titteya
Temp20–27°C
pH6–8
Size5 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Cherry barb
Puntius titteya
Taiwan (selectively bred from wild Neocaridina davidi)
Cherry Shrimp
Neocaridina davidi
Temp18–28°C
pH6.5–8
Size3 cm
DietOmnivore
SwimBottom
DifficultyEasy
Cherry Shrimp
Neocaridina davidi
South America
Chessboard cichlid
Dicrossus filamentosus
Temp27–30°C
pH4.5–7
Size10 cm
DietOmnivore
SwimBottom
DifficultyModerate
Chessboard cichlid
Dicrossus filamentosus
Asia
Chili Rasbora
Boraras brigittae
Temp20–28°C
pH4–7
Size2 cm
DietInsectivore
SwimMiddle
DifficultyModerate
Chili Rasbora
Boraras brigittae
Asia
Chinese algae-eater
Gyrinocheilus aymonieri
Temp22–26°C
pH6–8
Size28 cm
DietOmnivore
SwimBottom
DifficultyModerate
Chinese algae-eater
Gyrinocheilus aymonieri
Asia
Chinese barb
Barbodes semifasciolatus
Temp16–24°C
pH6–8
Size7.5 cm
DietOmnivore
SwimMiddle
DifficultyEasy
Chinese barb
Barbodes semifasciolatus
East Asia (China, Japan, Korea, Taiwan)
Chinese Bitterling
Rhodeus ocellatus
Temp18–24°C
pH6.5–7
Size9.2 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Chinese Bitterling
Rhodeus ocellatus
Asia
Chocolate gourami
Sphaerichthys osphromenoides
Temp26–31°C
pH4–6.5
Size5 cm
DietCarnivore
SwimMiddle
DifficultyModerate
Chocolate gourami
Sphaerichthys osphromenoides
Asia
Clown loach
Chromobotia macracanthus
Temp24–30°C
pH5–7
Size30.5 cm
DietCarnivore
SwimBottom
DifficultyModerate
Clown loach
Chromobotia macracanthus
Asia
Clown rasbora
Rasbora kalochroma
Temp23–28°C
pH5–7.5
Size10 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Clown rasbora
Rasbora kalochroma
Asia
Cobalt Blue Goby
Stiphodon semoni
Temp22–28°C
pH6.5–7.5
Size5 cm
DietHerbivore
SwimBottom
DifficultyModerate
Cobalt Blue Goby
Stiphodon semoni
South America
Cockatoo cichlid
Apistogramma cacatuoides
Temp22–29°C
pH6–8
Size5 cm
DietCarnivore
SwimBottom
DifficultyEasy
Cockatoo cichlid
Apistogramma cacatuoides
Río Acandí, Chocó, Colombia
Colombian Tetra
Hyphessobrycon columbianus
Temp20–28°C
pH5–7.5
Size6.5 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Colombian Tetra
Hyphessobrycon columbianus
Asia
Colored snakehead
Channa pulchra
Temp18–25°C
pH6–7.5
Size30 cm
DietCarnivore
SwimBottom
DifficultyExpert
Colored snakehead
Channa pulchra
Africa
Congo tetra
Phenacogrammus interruptus
Temp23–28°C
pH6–7.5
Size8 cm
DietOmnivore
SwimMiddle
DifficultyModerate
Congo tetra
Phenacogrammus interruptus
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