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Black ghost knifefish, left-facing adult natural-colour AI side-view illustration

Black ghost knifefish

Apteronotus albifrons

Black knife-shaped body, a pale forehead line and two pale tail rings; a long anal ribbon fin runs below the body, with no ordinary dorsal fin.

Adult length
Up to 50 cm
Water temperature
23–28 °C
Lifespan
Up to 15 years
pH
6–8
Hardness
5–10 dGH
Natural habitat
Inhabits fast-flowing creeks with sandy beds.

Small fish and shrimp are potential prey; plan daytime shelters.

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Appearance and identification

Unlike the brown African knifefish, it has conspicuous pale tail rings.

Same-species behaviour

More active in dim light; uses a weak electric field. Adults may bully conspecifics.

Space requirements

Plan substantial turning space for the adult, with clean oxygenated water and daytime shelters. A 180 × 60 cm base is the reference for one adult.

Diet and feeding

Offer suitable animal foods and check that it feeds.

Compatibility limits

Small fish and shrimp are potential prey.

Aquarium environment

Plants can shade shelters; leave swimming space.

Sources

www.fishbase.se ↗ 2026-10-25

www.seriouslyfish.com ↗ 2026-10-22

www.tfhmagazine.com ↗ 2026-10-22

www.aqua-imports.com ↗ 2026-10-22

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