Polypterus bichir, a hardy prehistoric fish with armored scales, is perfect for large freshwater tanks, offering unique appeal and fascinating behavior for advanced aquarists.

🐟 Polypterus bichir – Product Description

The Polypterus bichir is a remarkable prehistoric fish native to West and Central Africa, well-known for its elongated, armored body and distinct dorsal finlets. This ancient species, often referred to simply as “bichir,” has captivated aquarium enthusiasts with its unique appearance and hardy nature. Growing up to 18–24 inches (45–60 cm), the Polypterus bichir is an excellent choice for advanced hobbyists who have space for a large tank and desire a fish that adds both visual interest and intriguing behavior to their freshwater aquarium.

🌊 Water Conditions

• Temperature: 75–82°F (24–28°C)

• pH Range: 6.0 – 7.5 (slightly acidic to neutral)

• Hardness: 5–15 dGH

• Tank Size: Minimum 100 gallons to accommodate adult size and swimming needs

• Filtration: Strong filtration with gentle water movement; maintain excellent water quality

• Substrate: Soft sand or fine gravel to protect sensitive barbels and ventral skin

• Tank Setup: Provide plenty of hiding places using rocks, driftwood, and caves; subdued lighting preferred

🍽️ Feeding Habits

• Diet: Carnivorous and opportunistic predators

  • Accept a wide range of foods: live or frozen bloodworms, earthworms, shrimp, small fish, and carnivore pellets

  • May consume feeder fish but caution advised to avoid disease introduction

• Feeding Frequency: Feed once or twice daily, preferably in the evening or night when most active

• Feeding Tips: Place food near the bottom or use feeding tongs to mimic natural hunting behavior

🐠 Tank Mates

• Compatible Tank Mates:

  • Larger, peaceful to semi-aggressive fish such as large barbs, gouramis, and robust catfish

  • Other bichir species of similar size and temperament

• Avoid:

  • Small fish, which may be prey

  • Aggressive fish that may injure or stress the bichir

  • Overcrowded tanks to reduce territorial conflicts

🛠️ Care and Behavior

• Temperament:

  • Semi-aggressive and territorial, especially toward conspecifics or similar species

  • Primarily nocturnal but may be active during the day in well-established tanks

  • Best housed singly or in large tanks if with conspecifics

• Behavior:

  • Uses a modified swim bladder to breathe atmospheric air, so surface access is necessary

  • Slow, deliberate swimmers that explore and hide regularly

• Tank Maintenance:

  • Weekly water changes (25–40%) recommended to maintain water quality

  • Monitor ammonia and nitrite levels closely, as bichirs are sensitive to toxins

• Health:

  • Generally hardy but prone to bacterial infections if water quality is poor

  • Stable water parameters and good diet reduce disease risk

📌 Summary

The Polypterus bichir is a fascinating prehistoric fish that offers a unique visual and behavioral experience for advanced aquarists. Its armored body, striking dorsal finlets, and hardy nature make it a standout addition to large freshwater tanks. Proper care requires spacious aquariums, stable water conditions, and compatible tank mates. With attentive maintenance and feeding, the bichir can thrive for many years, making it a rewarding centerpiece or part of a specialized fish collection.