Killifish
Killifish is a semi-aggressive freshwater fish that needs a tank of at least 5 gallons (19 L), water at 68-75°F (20-24°C) and a pH of 6-7.5.
Also searched as: killifish, nothobranchius, fundulopanchax
Quick facts
Annual species in some cases. Wild-caught males have spectacular colors. Species only or with fast fish.
| Minimum tank | 5 gallons (19 L) |
|---|---|
| Temperature | 68-75°F (20-24°C) |
| pH | 6-7.5 |
| Temperament | Semi-aggressive |
| Swim level | Top |
| Group size | Can be kept singly |
| Tank type | Freshwater |
Good tank mates
Ranked by water overlap and temperament, using the same checks as the MyAquaLog compatibility tool.
- Amano Shrimpmin tank 5 gal
Temperature overlap 68-75°F, pH overlap 6.5-7.5. Semi-aggressive species may stress peaceful fish.
- Cherry Shrimpmin tank 5 gal
Temperature overlap 68-75°F, pH overlap 6.5-7.5. Semi-aggressive species may stress peaceful fish.
- Bladder Snailmin tank 5 gal
Temperature overlap 68-75°F, pH overlap 6-7.5. Semi-aggressive species may stress peaceful fish.
- Blue Velvet Shrimpmin tank 5 gal
Temperature overlap 68-75°F, pH overlap 6.5-7.5. Semi-aggressive species may stress peaceful fish.
- Pygmy Sunfishmin tank 5 gal
Temperature overlap 68-75°F, pH overlap 6-7.5. Semi-aggressive species may stress peaceful fish.
- Bee Shrimpmin tank 10 gal
Temperature overlap 68-75°F, pH overlap 6-6.8. Semi-aggressive species may stress peaceful fish.
- Blue Lyretail Killifishmin tank 10 gal
Temperature overlap 68-75°F, pH overlap 6-7.5. Both species may compete; monitor for aggression.
- Burmese Badismin tank 10 gal
Temperature overlap 68-75°F, pH overlap 6.5-7.5. Semi-aggressive species may stress peaceful fish.
Avoid with
Pairings that fail the temperament, water-overlap or known-conflict checks.
High risk of conflict between semi-aggressive and aggressive species; temperature overlap 74-75°F is too narrow.
Oscar Fishmin tank 55 galPea Puffermin tank 5 galChinese Algae Eatermin tank 30 gal- Skunk Loachmin tank 30 gal
High risk of conflict between semi-aggressive and aggressive species; no temperature overlap (68-75°F vs 79-86°F).
- African Cichlids (Mbuna)min tank 55 gal
High risk of conflict between semi-aggressive and aggressive species; no temperature overlap (68-75°F vs 76-82°F); no pH overlap (6-7.5 vs 7.8-8.6).
Check your own tank
These lists compare one species against the rest of the database. Your stock list, tank size and bioload change the answer, so log your own tank.
Start a tank logStocking guide
No account needed, it saves on this device.