Bichir — Fish Profile
Polypterus senegalus
Quick Specs
| Adult Size: | 12.0" |
| Temperament: | semi-aggressive |
| Care Level: | intermediate |
| Min Tank Size: | 55 gallons |
| Temperature: | 75-82°F |
| pH Range: | 6.5-7.5 |
| Diet: | carnivore |
| Origin: | Africa (Nile River Basin) |
| Lifespan: | 10-15 years |
Overview
Bichirs are ancient, eel-like fish with lung-like organs that allow them to gulp air from the surface. They are nocturnal predators that spend most of the day resting on the bottom. A tight-fitting lid is essential — they are notorious escape artists.
Care Guide for Bichir
Tank Setup
Bichir requires a minimum tank size of 55 gallons. Maintain water temperature between 75°F and 82°F, with a pH range of 6.5 to 7.5. A properly sized tank with adequate filtration and regular water changes is essential for long-term health. When housing Bichir with other species, always choose a tank size that accommodates the most demanding fish in the community.
Feeding
Bichir 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. Bichir reaches an adult size of 12.0 inches and has a care level of intermediate. 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
Bichir originates from Africa (Nile River Basin) and has an expected lifespan of 10-15 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 Bichir
All 69 compatibility checks involving Bichir:
Expert Care Tips for Bichir
- Large tank required: At 55+ gallons, Bichir needs serious equipment investment. Ensure your filter is rated for at least 1.5× the tank volume.
- Warm-water species: Bichir prefers 75–82°F. Use a reliable submersible heater with a thermostat — avoid temperature swings above 2°F per day.
- Narrow pH tolerance: Bichir only tolerates pH 6.5–7.5. Test your tap water before buying — adjusting pH is harder than choosing the right fish for your water.
- Semi-aggressive temperament: Bichir is generally peaceful but can become territorial. Provide ample hiding spots and avoid housing with fin-nipping species.
- Acclimation: Always drip-acclimate Bichir over 30–45 minutes. Match temperature and pH gradually to prevent osmotic shock.