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Description
Red Tail Golden Arowana (Scleropages formosus “Red Tail Golden”)
📌 Basic Info
Scientific Name: Scleropages formosus “Red Tail Golden”
Family: Osteoglossidae
Origin: Southeast Asia (Indonesia, Malaysia, Thailand, Vietnam)
Size: Up to 36 inches (90 cm) in the wild; typically 24–30 inches (60–75 cm) in aquariums
Lifespan: 15 – 20 years
Tank Zone: Top dweller (surface swimmer and jumper)
🌊 Water Parameters
TDS: 50 – 250 ppm
pH: 6.0 – 7.0
Temperature: 24 – 30°C (75 – 86°F)
Hardness: 2 – 12 dGH
🐟 Characteristics
Body: Golden with metallic scales and striking bright red tail fins
Nickname: “Red Tail Dragon Fish” due to vibrant red tail and majestic presence
Mouth: Bony tongue and upward-facing mouth for surface feeding
Jumping Ability: Can leap over 3 feet (1 m) to catch prey
Behavior: Juveniles are peaceful; adults may show territorial or predatory behavior; highly intelligent
🍽️ Food
Type: Carnivorous surface feeder
Diet: Live or frozen foods such as shrimp, prawns, fish, crickets, mealworms, and insects; can accept high-quality Arowana pellets
Feeding: Once or twice daily — avoid overfeeding; varied diet ensures health, growth, and vibrant coloration
🛠️ Maintenance
Tank Size: Minimum 250 gallons (950 L) for adults — larger tanks preferred
Filtration: Powerful filtration with high oxygenation; excellent water quality required
Decor: Open swimming space with minimal sharp objects; floating plants and driftwood recommended
Cover: Tight-fitting lid necessary (excellent jumpers)
Water Change: 25–30% weekly; maintain stable parameters
👥 Social Behavior
Minimum Group Size: Best kept singly (territorial as adults)
Tank Mates: Large, peaceful bottom/mid-level fish — Silver Dollars, Bichirs, Clown Loaches, large Plecos
Avoid: Small fish (they may be eaten), fin-nippers, or aggressive species
✅ Do’s
Keep in a large, covered tank with open swimming area
Maintain stable, warm, and clean water
Provide varied diet to enhance color and growth
Use floating plants or subdued lighting to reduce stress
❌ Don’ts
Don’t house with small or slow-moving fish
Don’t keep in tanks under 6 feet in length for adults
Don’t neglect water quality — sensitive to ammonia/nitrite
Don’t expose to strong direct light for long periods
⭐ Quick Tips
Red Tail Golden Arowanas are highly prized for their striking red fins and golden body
Intelligent and interactive — can recognize their owners
Requires large tanks, proper care, and long-term commitment to thrive