Unless otherwise stated, image is representative of species and not of actual product

Product Details


15cm - 28cm

Care Level



Semi Aggressive

Water Conditions

Introducing the enigmatic and mesmerizing Black Ghost Knife (Apteronotus albifrons), a unique and captivating freshwater fish known for its striking appearance and unusual behavior. Originating from South America, this species is a popular choice among experienced aquarium enthusiasts seeking a challenging and rewarding addition to their tanks. Let's delve into the fascinating world of the Black Ghost Knife:


  • Elegantly Dark: The Black Ghost Knife lives up to its name, featuring a sleek black body with a faint silver stripe running along its length. This dark coloration adds an air of mystery to its appearance, making it a standout feature in any aquarium.
  • Elongated Body: The knife-like body of this fish is elongated and flattened, resembling a blade, which is the source of its common name.


  • Nocturnal Behavior: Black Ghost Knives are primarily nocturnal, meaning they are more active during the night and may become reclusive during the day. Providing subdued lighting can encourage their activity.

Tank Compatibility:

  • Solo Species: Due to their territorial nature and the potential for aggression towards similar-looking fish, Black Ghost Knives are best kept as solitary individuals in a tank.
  • Peaceful Tankmates: They can coexist with other peaceful and non-aggressive fish species, provided they don't resemble knife-like shapes.

Tank Setup:

  • Large Tank: Given their size and need for swimming space, a tank of at least 75 gallons (284 liters) is recommended for a single Black Ghost Knife.
  • Hiding Spots: Offer plenty of hiding spots and caves created with driftwood, rocks, and plants to mimic their natural habitat.

Feeding Habit:

  • Carnivorous Diet: The Black Ghost Knife is a carnivore and prefers meaty foods such as live or frozen bloodworms, brine shrimp, and small feeder fish.
  • Nighttime Feeder: Being primarily nocturnal, they are more likely to feed during the night when the lights are dimmed.


  • Water Quality: Maintain excellent water quality with regular water changes and efficient filtration to ensure the well-being of the Black Ghost Knife.
  • Cover the Tank: These fish can be jumpers, so covering the tank with a secure lid is essential to prevent accidental escapes.

Black ghost knife

SGD 68.00

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Aquarium Fishes, Tanks & Supplies From Dragon Den West Coast