Silver Arowana |6-8 inch | Single

The Silver Arowana (Osteoglossum bicirrhosum) is a large and impressive freshwater fish native to the Amazon and Orinoco basins in South America. Known for its elongated body, metallic silver coloration, and graceful swimming style, the Silver Arowana is often considered a prized species in the aquarium trade. This majestic fish can grow quite large and requires specific care to thrive in a home aquarium.
Key Characteristics
Scientific Name: Osteoglossum bicirrhosum
Common Names: Silver Arowana, Amazon Arowana, Water Monkey
Size: Can grow up to 36 inches (90 cm), though most aquarium specimens reach around 24–30 inches (60–75 cm).
Lifespan: 10–15 years in captivity with proper care.
Coloration:
As the name suggests, the Silver Arowana has a shiny, metallic silver body.
Its scales are large and give off a reflective, almost mirror-like quality.
The fish's pectoral fins are long and wing-like, while its tail is slightly forked, contributing to its sleek and elegant appearance.
Shape:
The Silver Arowana has a long, streamlined body designed for swift swimming. It has two barbels (whisker-like appendages) on its lower jaw that it uses to sense food in the water.
Temperament:
It is generally peaceful but can be aggressive towards smaller fish, especially when it feels threatened or during feeding time.
It is not recommended to house with small fish or other slow-moving species.
Water Parameters
Temperature: 75–82°F (24–28°C)
pH: 6.0–7.5 (slightly acidic to neutral)
Hardness: 4–12 dGH (soft to moderately hard water)
Water Quality:
Arowanas are sensitive to poor water conditions.
Regular water changes (at least 25% per week) are crucial to maintaining a healthy environment, as the fish produces a significant amount of waste.
Tank Setup
Tank Size:
The Silver Arowana requires a large tank due to its size. A minimum tank size of 250 gallons (945 liters) is recommended for a single adult fish.
A larger tank (300–400 gallons) is ideal to allow the fish to swim freely and to minimize aggression.
Substrate:
A fine gravel or bare-bottom tank is suitable. The Silver Arowana does not interact much with the substrate.
Decor and Plants:
Keep decorations minimal as the fish is a strong swimmer and needs plenty of open space.
Live plants can be included, but they should be sturdy and well-rooted, as the Arowana may disturb them.
Large driftwood or rocks can be used for aesthetic appeal, but avoid placing any sharp objects that could injure the fish.
Filtration:
A strong filtration system is essential due to the Arowana's size and high waste production. Consider using a canister filter or a sump system to maintain excellent water quality.
Lighting:
Moderate lighting is ideal. Avoid overly bright lighting that may cause stress to the fish.
Diet
Type: Carnivorous
Preferred Foods:
In the wild, Silver Arowanas feed on smaller fish, insects, and even birds that fall into the water. In captivity, they will accept a variety of foods such as:
Live or frozen fish (e.g., feeder fish, smelt, or tilapia).
Insects such as crickets or worms.
Pellet and freeze-dried food specifically designed for large carnivorous fish.
Occasionally, they may also enjoy shrimp or small mollusks.
Feeding Tips:
Offer food 2–3 times per week, depending on the age and size of the fish.
It's important not to overfeed, as the Arowana can become obese.
Remove uneaten food promptly to prevent water contamination.
Behavior and Tank Mates
Behavior:
Silver Arowanas are generally calm but can display territorial behavior, especially when they feel their space is threatened.
They are surface dwellers, often seen swimming near the top of the tank, and can jump out of the water, so a secure, covered tank is necessary.
Arowanas are known for their excellent jumping ability, so it's critical to ensure the tank lid is secure.
Suitable Tank Mates:
Due to their large size and predatory nature, it's best to house them with other large, fast-moving fish.
Suitable tank mates include other large cichlids, fast-growing catfish, and robust fish species like bichirs, stingrays, or plecos.
Avoid keeping them with smaller fish, as they may be eaten, and be cautious with other long-bodied fish like piranhas or tetras.
Breeding
Difficulty: Difficult to breed in captivity
Breeding Setup:
Breeding Silver Arowanas in captivity is rare and requires very specific conditions.
They prefer large, natural-style tanks with plenty of space to swim.
The fish are egg layers, and the male typically fertilizes the eggs after the female lays them.
After fertilization, the eggs are often carried by the male in his mouth until they hatch.
Fry Care:
The fry are extremely delicate and require special care. They feed primarily on small live foods like baby brine shrimp until they grow large enough to accept other foods.
Care Tips
Tank Size: Ensure the tank is large enough for the fish to move freely. As they grow, they require more space.
Water Quality: Arowanas are sensitive to poor water conditions, so regular water changes and a good filtration system are crucial.
Feeding: Provide a varied diet to ensure the fish gets all the necessary nutrients. Avoid overfeeding.
Jumping: Always ensure the tank has a secure lid, as Arowanas are known for jumping out of the water.
Avoid Aggression: Choose tank mates carefully to avoid stress and aggression.
Why Choose the Silver Arowana?
Aesthetic Appeal: The Silver Arowana is a stunning fish with its metallic sheen and graceful swimming. It's an eye-catching addition to any large aquarium.
Hardy and Adaptable: With the right care, Silver Arowanas can live for many years and thrive in a variety of conditions.
Impressive Size: This fish's size and striking appearance make it a centerpiece in an aquarium.