Black Neon Tetra
Hyphessobrycon herbertaxelrodi
- Care level
- Beginner
- Adult size
- 3–3.5 cm
- Minimum tank
- 70 litres
- Temperature
- 20–28 °C
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Blacknose Butterfly Barb
Enteromius candens
- Care level
- Intermediate
- Adult size
- 3.5 cm
- Minimum tank
- 40 litres
- Temperature
- 17–24 °C
Black Phantom Tetra
Megalamphodus megalopterus
- Care level
- Beginner
- Adult size
- 3.6 cm
- Minimum tank
- 72 litres
- Temperature
- 20–28 °C
Black Ruby Barb
Pethia nigrofasciata
- Care level
- Beginner
- Adult size
- 5.5 cm
- Minimum tank
- 72 litres
- Temperature
- 20–27 °C
Black Skirt Tetra
Gymnocorymbus ternetzi
- Care level
- Beginner
- Adult size
- 5–6 cm
- Minimum tank
- 70 litres
- Temperature
- 20–26 °C
Blackstripe Corydoras
Hoplisoma bondi
- Care level
- Intermediate
- Adult size
- 4–5.5 cm
- Minimum tank
- 75 litres
- Temperature
- 22–27 °C
Black Swordtail
Xiphophorus helleri var. "Black"
- Care level
- Intermediate
- Adult size
- 14 cm
- Minimum tank
- 108 litres
- Temperature
- 16–28 °C
Blacktop Corydoras
Corydoras acutus
- Care level
- Intermediate
- Adult size
- 5.5–7 cm
- Minimum tank
- 100 litres
- Temperature
- 22–27 °C
Black Venezuela Corydoras
Osteogaster aenea var. "Black Venezuela"
- Care level
- Beginner
- Adult size
- 5–6.5 cm
- Minimum tank
- 75 litres
- Temperature
- 21–28 °C
Bleeding Heart Platy
Xiphophorus maculatus var. "Bleeding Heart"
- Care level
- Intermediate
- Adult size
- 5 cm
- Minimum tank
- 54 litres
- Temperature
- 20–26 °C
Bleeding Heart Tetra
Megalamphodus erythrostigma
- Care level
- Intermediate
- Adult size
- 6 cm
- Minimum tank
- 81 litres
- Temperature
- 21–28 °C
Bloodfin Tetra
Aphyocharax anisitsi
- Care level
- Beginner
- Adult size
- 5.5 cm
- Minimum tank
- 54 litres
- Temperature
- 18–28 °C
Blood Tailed Danio
Devario annandalei
- Care level
- Intermediate
- Adult size
- 7–9 cm
- Minimum tank
- 180 litres
- Temperature
- 20–26 °C
Blue Cheek Dwarf Cichlid
Apistogramma eunotus
- Care level
- Intermediate
- Adult size
- 4.5–7 cm
- Minimum tank
- 60 litres
- Temperature
- 23–30 °C
Blue Diamond Discus
Symphysodon aequifasciatus var. "Blue Diamond"
- Care level
- Advanced
- Adult size
- 15–18 cm
- Minimum tank
- 350 litres
- Temperature
- 27–31 °C
Blue Diamond Tetra
Alestopetersius smykalai
- Care level
- Intermediate
- Adult size
- 6 cm
- Minimum tank
- 108 litres
- Temperature
- 20–28 °C
Blue Discus
Symphysodon aequifasciatus var. "Blue"
- Care level
- Advanced
- Adult size
- 12–15 cm
- Minimum tank
- 350 litres
- Temperature
- 28–30 °C
Blue Dolphin Cichlid
Cyrtocara moorii
- Care level
- Advanced
- Adult size
- 25 cm
- Minimum tank
- 217 litres
- Temperature
- 25–29 °C
Blue Fin Hillstream Loach
Gastromyzon aeroides
- Care level
- Specialist
- Adult size
- 4.2–6 cm
- Minimum tank
- 60 litres
- Temperature
- 20–25 °C
Blue Harlequin Rasbora
Trigonostigma heteromorpha var. Blue
- Care level
- Beginner
- Adult size
- 4.5 cm
- Minimum tank
- 54 litres
- Temperature
- 21–28 °C
Blue Line Rasbora
Rasbora sarawakensis
- Care level
- Beginner
- Adult size
- 5 cm
- Minimum tank
- 87 litres
- Temperature
- 22–26 °C
Blue Moon Danio
Devario xyrops
- Care level
- Specialist
- Adult size
- 6–7.7 cm
- Minimum tank
- 100 litres
- Temperature
- 18–26 °C
Blue Neon Cichlid
Paracyprichromis nigripinnis
- Care level
- Intermediate
- Adult size
- 11 cm
- Minimum tank
- 243 litres
- Temperature
- 24–27 °C
Blue Panaque Plecostomus L239
Baryancistrus beggini
- Care level
- Advanced
- Adult size
- 11.2–15 cm
- Minimum tank
- 250 litres
- Temperature
- 26–31 °C
Blue Purple Emperor Tetra
Inpaichthys kerri
- Care level
- Beginner
- Adult size
- 3.5 cm
- Minimum tank
- 87 litres
- Temperature
- 24–27 °C
Blue Spotted Hill Trout
Opsarius bakeri
- Care level
- Advanced
- Adult size
- 13 cm
- Minimum tank
- 540 litres
- Temperature
- 18–26 °C
Boeseman’s Rainbowfish
Melanotaenia boesemani
- Care level
- Intermediate
- Adult size
- 9–11 cm
- Minimum tank
- 110 litres
- Temperature
- 27–30 °C
Bolivian Ram Cichlid
Mikrogeophagus altispinosus
- Care level
- Beginner
- Adult size
- 6–9 cm
- Minimum tank
- 80 litres
- Temperature
- 23–28 °C
Borneo Red Fin Silver Shark
Cyclocheilichthys janthochir
- Care level
- Intermediate
- Adult size
- 20 cm
- Minimum tank
- 364 litres
- Temperature
- 22–27 °C
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