Silver Arowana — Fish Profile
Osteoglossum bicirrhosum
Quick Specs
| Adult Size: | 36.0" |
| Temperament: | semi-aggressive |
| Care Level: | advanced |
| Min Tank Size: | 250 gallons |
| Temperature: | 75-82°F |
| pH Range: | 6.0-7.5 |
| Diet: | carnivore |
| Origin: | South America (Amazon Basin) |
| Lifespan: | 15-20 years |
Overview
Silver Arowanas are large, powerful surface-dwelling fish often called 'water monkeys' for their ability to leap out of the water to catch prey. They have a metallic silver body and an upward-pointing mouth adapted for surface feeding. They require enormous tanks with tight-fitting lids as they are notorious jumpers. Not for beginners — their size and feeding requirements demand serious commitment.
Care Guide for Silver Arowana
Tank Setup
Silver Arowana requires a minimum tank size of 250 gallons. Maintain water temperature between 75°F and 82°F, with a pH range of 6.0 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Silver Arowana with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Silver Arowana is a carnivore feeder. Provide a varied diet appropriate for carnivore species to ensure optimal health and coloration. Feed small portions 2–3 times daily, and remove uneaten food after a few minutes to maintain water quality.
Temperament & Compatibility
This species is classified as semi-aggressive. Silver Arowana reaches an adult size of 36.0 inches and has a care level of advanced. Always research compatibility before adding new fish to an established aquarium. Individual temperament can vary, so monitor new introductions closely for the first 48 hours.
Origin & Lifespan
Silver Arowana originates from South America (Amazon Basin) and has an expected lifespan of 15-20 years when kept in proper water conditions with appropriate tank mates and diet.
Compatible Tank Mates
🟢 Good Tank Mates
🟡 Caution Tank Mates
🔴 Risky Tank Mates
Compatibility Results for Silver Arowana
All 69 compatibility checks involving Silver Arowana:
Recommended for Silver Arowana
Hikari Food Sticks — $18.99Floating food sticks for large carnivorous surface feeders
Expert Care Tips for Silver Arowana
- Large tank required: At 250+ gallons, Silver Arowana needs serious equipment investment. Ensure your filter is rated for at least 1.5× the tank volume.
- Warm-water species: Silver Arowana prefers 75–82°F. Use a reliable submersible heater with a thermostat — avoid temperature swings above 2°F per day.
- Adaptable pH range: Silver Arowana accepts pH 6.0–7.5. Most tap water falls within this range, but always test and acclimate slowly.
- Semi-aggressive temperament: Silver Arowana is generally peaceful but can become territorial. Provide ample hiding spots and avoid housing with fin-nipping species.
- Acclimation: Always drip-acclimate Silver Arowana over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.