Species profile
Bichir Delhezi
Polypterus delhezi
Peaceful
Moderate care
650 L minimum aquarium
30–44 cm adult size
Bottom all
Can be kept singly
About this species
General notes for hobby use.
Adult housing raised substantially to match current 44 cm size and Fishkeeper's 6 × 2 × 2 ft recommendation.
Water parameters
Suggested general range for long-term care.
Temperature
25–28 °C
pH
6–8
GH
2–25 dGH
KH
Not yet documented
Flow preference
Low–moderate
Data confidence
Verified
Behaviour
General behaviour traits used by TanksConnected compatibility checks.
Minimum group size
Can be kept singly
Tank zone
Bottom all
Territory level
Low
Predation risk
Small fish
Bioload factor
4
Usually not aggressive to fish too large to swallow, but a capable nocturnal predator and exceptional escape artist.
Compatibility flags
Quick cautions for common tank-planning issues.
Fin nipper
No
Plant safe
Yes
Shrimp safe
No / caution
Snail safe
Yes
Cave breeder
No
Digs substrate
No
Jump risk
Yes
Natural history & care
Research-backed context for long-term aquarium care.
Lifespan
Not yet documented
Diet type
Carnivore
Minimum aquarium volume
650 L
Minimum footprint
180 × 60 cm
Accepted scientific name
Polypterus delhezi
Alternative names
Banded Bichir, Armoured Bichir
Native range
Middle Congo River basin, Democratic Republic of the Congo and Republic of the Congo.
Natural habitat
Quiet lakes, streams and inundated vegetated areas. Provide a 180 × 60 cm-class tank, soft sand, shade, large refuges and a very secure lid with an air gap.
Diet & feeding
Meaty sinking foods, frozen invertebrates and appropriately sized whole aquatic foods; small tankmates will be eaten.
Breeding & sexing
Research-backed guidance for identifying sexes and reproductive behaviour.
Sexing
Adult males have a broader, thicker anal fin; females become heavier-bodied.
Breeding
Egg-scattering polypterid; captive breeding is possible but specialist. Male anal fin enlarges/thickens in breeding condition.