Description
Red Tail Catfish (Phractocephalus hemioliopterus)
📌 Basic Info
Scientific Name: Phractocephalus hemioliopterus
Common Name: Red Tail Catfish / RTC
Size: Up to 4–5 feet (120–150 cm) in the wild, 3–4 feet in aquariums
Lifespan: 15 – 20 years
Tank Zone: Bottom (sometimes mid when active)
🌊 Water Parameters
TDS (Total Dissolved Solids): 150 – 300 ppm
pH: 6.0 – 7.5
Temperature: 22°C – 28°C (72°F – 82°F)
Water Type: Freshwater, soft to moderately hard
Hardness: GH 4 – 12, KH 2 – 6
🐟 Characteristics
Recognized by its black body, white underside, and bright red/orange tail.
Very fast-growing → requires a huge tank or pond.
Powerful predator – will eat anything that fits in its mouth.
Hardy but needs strong filtration due to heavy waste production.
🍽️ Food
Type: Carnivorous
Diet: Fish fillets, shrimp, prawns, earthworms, sinking carnivore pellets, mussels.
Feeding Frequency: Juveniles daily; adults 3–4 times per week.
🛠️ Maintenance
Tank Size: Minimum 1,000 gallons (pond-size tank for adults).
Weekly water change: 20–30%.
Strong external or sump filtration → produces a lot of waste.
Sand or smooth substrate, large hiding areas with driftwood or rocks.
Very secure lid – strong and fast swimmer.
👥 Social Behavior
Minimum Group Size: Best kept singly (very territorial with other RTCs).
Tank Mates: Only other giant fish (arowana, pacu, giant gourami, pangasius, big catfish).
Avoid: Small or medium fish, shrimp, or invertebrates – will be eaten.
✅ Do’s
Keep in a very large tank or pond.
Provide powerful filtration and aeration.
Feed high-protein, varied diet.
Handle with care – strong jaws and spines.
❌ Don’ts
Don’t keep with small/medium tank mates.
Don’t keep in small aquariums (they outgrow tanks very fast).
Don’t overfeed fatty foods like beef heart or chicken.
Don’t house multiple RTCs in one tank.
⭐ Quick Tips
Popular monster fish for advanced aquarists.
Not suitable for beginners due to size and feeding needs.
Beautiful but requires a huge long-term commitment





