Peacock eel
Macrognathus siamensis
- Tank length
- 120 cmabout 4 ft (47 in)
- Start with
- 1
- Temperature
- 22–28 °C72–82 °F
- pH
- 6–8
- Adult size
- 12.9 cm5.1 in
- Lifespan
- 8–15 yrs
Needs fine sand to bury in and soft meaty food; will eat fish small enough to swallow.Needs fine sand to bury in and soft meaty food; will eat fish small enough to swallow.
Tank sizes
Good tankmates
Avoid with
- Alligator gar
Alligator gar may eat Peacock eelAlligator gar may eat Peacock eel
- Antenna ray
Antenna ray may eat Peacock eelAntenna ray may eat Peacock eel
- Arapaima
Arapaima may eat Peacock eelArapaima may eat Peacock eel
- Asian arowana
Asian arowana may eat Peacock eelAsian arowana may eat Peacock eel
- Australian pearl arowana
Australian pearl arowana may eat Peacock eelAustralian pearl arowana may eat Peacock eel
- Bullseye snakehead
Bullseye snakehead may eat Peacock eelBullseye snakehead may eat Peacock eel
- Butterfly peacock bass
Butterfly peacock bass may eat Peacock eelButterfly peacock bass may eat Peacock eel
- Channel catfish
No shared temperature rangeNo shared temperature range
- Clown knifefish
Clown knifefish may eat Peacock eelClown knifefish may eat Peacock eel
- Common river stingray
Common river stingray may eat Peacock eelCommon river stingray may eat Peacock eel
- Congo bichir
Congo bichir may eat Peacock eelCongo bichir may eat Peacock eel
- Cuban gar
Cuban gar may eat Peacock eelCuban gar may eat Peacock eel
Data used by the planner
| Temperature | 22–28 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · medium confidence |
|---|---|---|
| pH | 6–8 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · medium confidence |
| Hardness (dGH) | 5–19 | AqAdvisor (aqadvisor.com), retrieved 2026-10-04 · medium confidence |
| Origin | Mekong and Chao Phraya basins, Southeast Asia | curated-v0 (needs expert review) · low confidence |
| Beginner friendly | No | curated-v0 (needs expert review) · medium confidence |
| Care level | moderate | curated-v0 (needs expert review) · medium confidence |
| Activity | sedentary | curated-v0 (needs expert review) · medium confidence |
| Swimming level | bottom | 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 | carnivore | curated-v0 (needs expert review) · medium confidence |
| Lifespan (years) | 8–15 | curated-v0 (needs expert review) · low confidence |
| Months to adult size | 18 | curated-v0 (needs expert review) · low confidence |
| Safe with plants | Yes | curated-v0 (needs expert review) · medium confidence |
| Minimum tank length | 120 | curated-v0 (needs expert review) · medium confidence |