
Fire eel
Mastacembelus erythrotaenia
A long dark brown fish with red-orange lines that break into rear spots.
A long dark brown fish with red-orange lines that break into rear spots, a pointed rostrum and small pectoral fins.
- Adult length
- Up to 100 cm (standard length, without the tail fin)
- Water temperature
- 24–28 °C
- pH
- 6–7
- Hardness
- 5–12 dGH
- Natural habitat
- Inhabits slow rivers and inundated plains on lowland floodplains.
Appearance and identification
Peacock eel has rear dorsal eyespots rather than red-orange lines and spots.
Same-species behaviour
Often hides by day; conspecific aggression can occur.
Space requirements
Reaches 100 cm SL. Secure cover, soft sand, refuges and large facilities are essential.
Diet and feeding
Offer appropriately sized animal foods such as shrimp, fish and worms. Small fish may be eaten.
Aquarium environment
Burrowing and the large body can disturb planting. Retain sand, shelter and clear movement space.
Sources
www.aquariumglaser.de ↗ 2026-10-22
www.fishbase.se ↗ 2026-10-25
www.seriouslyfish.com ↗ 2026-10-22