
Ropefish
Erpetoichthys calabaricus
Rope-like body with an olive-brown back, yellow-orange belly and no pelvic fins.
Rope-like body with olive-brown back, yellow-orange belly and a dark pectoral-base patch; lacks the pelvic fins found in Polypterus.
- Adult length
- Up to 37 cm (standard length, without the tail fin)
- Water temperature
- 23–30 °C
- Lifespan
- Up to 20 years
- pH
- 6–7.5
- Hardness
- 5–20 dGH
- Native range
- Africa: coastal species, inhabiting river estuaries from Ouémé River in Benin to Sanaga River in Cameroon.
- Natural habitat
- Inhabits slow rivers and standing waters, associated with reed beds.
Appearance and identification
Much more slender than a Senegal bichir and lacks pelvic fins. Both need access to air; it is not a true eel.
Same-species behaviour
Mostly nocturnal.
Space requirements
Prevent escapes while keeping surface breathing access; plan for adult size. Use a 150 × 60 cm base.
Diet and feeding
Offer suitable animal foods and make sure slow feeders get enough; it may not take pellets.
Compatibility limits
Small fish are prey.
Aquarium environment
Soft substrate, plants and wood can provide cover. Keep surfacing routes open.
Sources
www.fishbase.se ↗ 2026-10-25
www.polypterus.info ↗ 2026-10-22
www.seriouslyfish.com ↗ 2026-10-22