Black Arowana - Osteoglossum ferreirai - Live Fish

Black Arowana (Osteoglossum ferreirai)

Exotic, Mysterious, and Majestic – A Rare Gem Among Arowanas

The Black Arowana is a highly sought-after species in the world of exotic fish, known for its sleek black body, shimmering blue-green undertones, and striking red-orange fins. Native to the Rio Negro basin in South America, this rare arowana species is admired for its elegance, power, and dramatic coloration—especially in its juvenile stage, when its contrast is most vivid.

As it matures, the Black Arowana transitions to a darker silver-gray tone with subtle iridescence, maintaining a unique beauty that sets it apart from the more common Silver Arowana. Reaching lengths of up to 36 inches, this surface-dwelling predator requires a large aquarium (minimum 250 gallons) and a dedicated, experienced aquarist.

Key Features:

• Scientific Name: Osteoglossum ferreirai

• Common Name: Black Arowana

• Origin: Rio Negro, Amazon Basin (South America)

• Maximum Size: Up to 36 inches

• Temperament: Semi-aggressive, predatory

• Tank Size: 250+ gallons (larger for adults)

• Diet: Carnivorous – eats live/frozen fish, shrimp, insects; can be trained to accept pellets

• Water Parameters:

  • Temperature: 75–82°F

  • pH: 5.5–7.0

  • Water Hardness: Soft

Care Notes:

Black Arowanas thrive in soft, acidic water and need pristine water conditions and strong filtration. They are powerful jumpers and should be housed in tanks with secure, tight-fitting lids. Best kept in a species-only setup or with other large, peaceful fish, they need ample space to swim and minimal stress.

Their graceful, gliding motion and rare coloration make them a show-stopping centerpiece in any large freshwater aquarium.

Add a touch of mystery and prestige to your collection with the rare and elegant Black Arowana – available at Rockland Aquarium.