Common goldfish
Carassius auratus
Photo: James St. John · CC BY 2.0
- Tank length
- 180 cmabout 6 ft (71 in)
- Start with
- 1
- Temperature
- 19–23 °C66–73 °F
- pH
- 6–8
- Adult size
- 21.6 cm8.5 in
- Lifespan
- 10–20 yrs
An adult usually needs pond-scale room and cool well-oxygenated water.An adult usually needs pond-scale room and cool well-oxygenated water.
Tank sizes
Good tankmates
Avoid with
Neon tetraCheck Common goldfish with Neon tetraCheck Common goldfish with Neon tetra
BettaCheck Betta with Common goldfishCheck Betta with Common goldfish
Cardinal tetraCheck Common goldfish with Cardinal tetraCheck Common goldfish with Cardinal tetra
- Acei cichlid
No shared temperature rangeNo shared temperature range
- Ajamaru rainbowfish
No shared temperature rangeNo shared temperature range
- Angfa rainbowfish
No shared temperature rangeNo shared temperature range
- Arfak rainbowfish
No shared temperature rangeNo shared temperature range
- Batanta rainbowfish
No shared temperature rangeNo shared temperature range
- Black kuhli loach
No shared temperature rangeNo shared temperature range
Black neon tetraNo shared temperature rangeNo shared temperature range
- Blue emperor tetra
No shared temperature rangeNo shared temperature range
- Blue rainbowfish
No shared temperature rangeNo shared temperature range
Data used by the planner
| Temperature | 19–23 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · low confidence |
|---|---|---|
| pH | 6–8 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04; agrees with FishBase (fishbase.se), retrieved 2026-10-04 · medium confidence |
| Hardness (dGH) | 5–15 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · low confidence |
| Origin | East Asia; captive varieties | curated-v0 (needs expert review) · medium confidence |
| Beginner friendly | No | curated-v0 (needs expert review) · medium confidence |
| Care level | advanced | curated-v0 (needs expert review) · medium confidence |
| Activity | active | curated-v0 (needs expert review) · medium confidence |
| Swimming level | middle | curated-v0 (needs expert review) · medium confidence |
| Temperament | peaceful | curated-v0 (needs expert review) · medium confidence |
| Nips fins | No | curated-v0 (needs expert review) · medium confidence |
| Long fins | No | curated-v0 (needs expert review) · medium confidence |
| Territorial | No | curated-v0 (needs expert review) · medium confidence |
| Lives in groups | No | curated-v0 (needs expert review) · medium confidence |
| Minimum group | 1 | curated-v0 (needs expert review) · medium confidence |
| Diet | herbivore | curated-v0 (needs expert review) · medium confidence |
| Lifespan (years) | 10–20 | curated-v0 (needs expert review) · low confidence |
| Months to adult size | 24 | curated-v0 (needs expert review) · low confidence |
| Safe with plants | No | curated-v0 (needs expert review) · medium confidence |
| Minimum tank length | 180 | curated-v0 (needs expert review) · medium confidence |