Silver Arowana (Osteoglossum bicirrhosum)

The Silver Arowana (Osteoglossum bicirrhosum) is an iconic South American freshwater fish renowned for its metallic sheen and elegant surface-cruising behavior. Often called the “dragon fish,” it can reach 36 inches and become a true centerpiece.

Care & Requirements

• Tank Size: 180 gallons for juveniles; 250+ gallons for adults.

• Water: 75–82°F (24–28°C); pH 6.0–7.5; soft to moderately hard.

• Diet: Carnivorous—high-quality pellets, shrimp, fish, and insects; provide variety for nutrition.

• Behavior: Powerful jumper—use a tight-fitting lid. Predatory nature; keep alone or with very large, robust tankmates.

• Maintenance: Strong filtration, weekly water changes (30–40%), open swimming space, gentle surface flow.