Black Ghost Knifefish (Apteronotus albifrons) 9cm Mysterious, intelligent and unlike almost any other freshwater fish, the Black Ghost Knifefish is a remarkable South American species recognised by its jet-black body, flowing ribbon-like anal fin and contrasting white markings. Rather than swimming like a conventional fish, Apteronotus albifrons glides forwards, backwards and vertically with extraordinary control while using a weak electrical field to navigate its surroundings. This is a true feature fish for large, mature aquariums. Quick Facts Brand: Aris Product type: Misc Fish Size / Capacity: 9cm Suitable for: Species-appropriate, established aquariums Is this for you? ✔️ Perfect if: Your aquarium is fully cycled and stable. Adult size, social needs and compatibility have been checked. You can provide the correct water conditions, diet and habitat. You can receive and acclimate live livestock promptly. ❌ Consider something else if: The aquarium is new, uncycled or unstable. Compatibility or long-term space has not been confirmed. You cannot meet the species-specific husbandry requirements. Why choose Black Ghost Knifefish (Apteronotus albifrons) 9cm? It provides a clearly identified livestock option that can be assessed against your aquarium. Matching adult size, behaviour and water needs helps prevent avoidable stress. A planned addition is easier to acclimate, feed and monitor. It is preferable to a similar-looking species when its long-term needs better suit your setup. Key Benefits Planned selection – Supports matching livestock to a suitable aquarium. Aquarium suitability – Can become a rewarding part of a properly planned community. Clear checks – Encourages confirmation of size, water and compatibility. Long-term care – Keeps husbandry ahead of impulse selection. Specialist support – NTA can help clarify suitability before ordering. Specifications Capacity / Size: 9cm Shopify category: Live Animals Specifications may vary by model or manufacturer revision. Please check the selected variant where applicable. What's included? The selected live livestock variant. Protective packing appropriate to the available fulfilment method. Care or acclimation guidance where supplied. Only items explicitly stated in the listing are included. Setup & Use Prepare and test the aquarium before arrival. Inspect the package and follow current NTA acclimation guidance. Introduce the livestock calmly with reduced lighting where appropriate. Observe behaviour and compatibility closely. Maintain stable water and feed an appropriate diet. Maintenance Regular inspection and appropriate care help keep this product or livestock in suitable condition. Test water regularly. Maintain stable, species-appropriate parameters. Feed controlled portions of a suitable diet. Monitor growth, behaviour and compatibility. Pairs perfectly with A reliable water test kit. Species-appropriate food. Water conditioner. Suitable plants, caves or cover. A quarantine or observation setup where appropriate. NTA Insight: Check the adult animal, not only the size offered today. Adult size, social needs and behaviour are often the deciding factors. Before You Buy Compatibility: Confirm the exact product, variant, livestock and system compatibility before ordering. Sizing: Use verified dimensions, actual aquarium volume and the intended application rather than relying on appearance alone. Installation: Check access, placement, connections and safe operating requirements before use. Replacement parts: Availability varies by product and manufacturer; confirm the exact model or SKU when a replacement is essential. FAQ How large does a Black Ghost Knifefish grow?Adults can reach approximately 40–50 cm, so they require a genuinely large aquarium and should never be purchased based solely on their juvenile size. Why is it called a Black Ghost Knifefish?The name comes from its dark black colouration, unusual knife-like body shape and ghost-like gliding movement through the water. Can Black Ghost Knifefish swim backwards?Yes. The long ribbon-like anal fin allows them to move forwards, backwards and hover with excellent control. Are Black Ghost Knifefish electric?Yes, but not in the sense of an Electric Eel. They produce a weak electrical field used for navigation, communication and locating objects or prey in low-light environments. The electrical discharge is not dangerous to aquarium keepers. Are Black Ghost Knifefish nocturnal?They are primarily nocturnal and often become most active during subdued lighting, around dusk and after the main aquarium lights are switched off. Do they need a cave?Yes. A secure dark retreat is extremely important. Large smooth caves, tubes and shaded spaces beneath driftwood help the fish feel secure during daylight hours. Can I use a clear tube?Some aquarists use transparent tubes to allow viewing while the fish rests, but the fish still needs to feel secure. A fully shaded retreat should always be available if it prefers darkness. What should I feed Black Ghost Knifefish?Offer quality carnivore foods supplemented with frozen and live foods such as bloodworms, worms, brine shrimp and appropriately sized pieces of prawn or other meaty foods. Newly introduced fish may initially be more willing to feed after dark. What does Black Ghost Knifefish (Apteronotus albifrons) 9cm do?Black Ghost Knifefish (Apteronotus albifrons) 9cm is intended for species-appropriate, established aquariums. Check the selected option and listing details against your needs. What aquarium size is it suitable for?Use any verified rating in the Specifications section as a starting point. If no rating is stated, contact NTA when tank size is the deciding factor. Is this the right model for my aquarium?Confirm purpose, physical fit, capacity and compatibility before ordering. What's included in the box?Only the selected product and components explicitly stated in the current listing are included.
