Fish Database
Practical profiles for popular aquarium fish —adult size, minimum tank, water parameters, temperament, and schooling needs —so you can plan before you buy.
- semi-aggressive
Betta (Siamese Fighting Fish)
Betta splendens
- Adult size
- 2.5" · 5+ gal
- Temperature
- 76–82°F · pH 6.5–7.5
- Schooling
- Fine alone
- peaceful
Neon Tetra
Paracheirodon innesi
- Adult size
- 1.2" · 10+ gal
- Temperature
- 70–79°F · pH 5.5–7
- Schooling
- Keep 6+ together
- peaceful
Guppy
Poecilia reticulata
- Adult size
- 1.8" · 10+ gal
- Temperature
- 72–82°F · pH 6.8–7.8
- Schooling
- Keep 3+ together
- semi-aggressive
Angelfish
Pterophyllum scalare
- Adult size
- 6" · 30+ gal
- Temperature
- 76–84°F · pH 6–7.5
- Schooling
- Keep 2+ together
- peaceful
Bronze Corydoras
Corydoras aeneus
- Adult size
- 2.5" · 20+ gal
- Temperature
- 72–80°F · pH 6–8
- Schooling
- Keep 6+ together
- peaceful
Harlequin Rasbora
Trigonostigma heteromorpha
- Adult size
- 1.8" · 10+ gal
- Temperature
- 72–82°F · pH 6–7.5
- Schooling
- Keep 6+ together
- peaceful
Zebra Danio
Danio rerio
- Adult size
- 2" · 20+ gal
- Temperature
- 65–77°F · pH 6.5–7.5
- Schooling
- Keep 6+ together
- peaceful
Platy
Xiphophorus maculatus
- Adult size
- 2.2" · 10+ gal
- Temperature
- 68–79°F · pH 7–8.2
- Schooling
- Keep 3+ together
- peaceful
Molly
Poecilia sphenops
- Adult size
- 3.5" · 20+ gal
- Temperature
- 72–82°F · pH 7.5–8.5
- Schooling
- Keep 3+ together
- peaceful
Cherry Barb
Puntius titteya
- Adult size
- 2" · 20+ gal
- Temperature
- 72–79°F · pH 6–7.5
- Schooling
- Keep 6+ together
- peaceful
Kuhli Loach
Pangio kuhlii
- Adult size
- 4" · 20+ gal
- Temperature
- 75–86°F · pH 5.5–7
- Schooling
- Keep 5+ together
- peaceful
Honey Gourami
Trichogaster chuna
- Adult size
- 2" · 10+ gal
- Temperature
- 75–82°F · pH 6–7.5
- Schooling
- Fine alone